Physical downlink control channel limit handling for enhanced cross-carrier scheduling

ABSTRACT

A communication device in a communications network can monitor physical downlink control channel, PDCCH, candidates on a primary cell, PCell, for PCell assignments. The communication device can further determine a maximum number of monitoring elements based on at least one of a higher layer configuration related to secondary cell, SCell, to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell. The communication device can further, responsive to determining the maximum number of monitoring elements, monitor the PDCCH candidates on the SCell based on the maximum number of monitoring elements.

TECHNICAL FIELD

The present disclosure is related to wireless communication systems and more particularly to cross-carrier scheduling.

BACKGROUND

FIG. 1 illustrates an example of a Stn Generation (“5G”) network (also referred to as a new radio (“NR”) network) including a network node 102 (e.g., a 5G base station (“gNB”)), multiple communication devices 104 (also referred to as user equipment (“UE”)).

Carrier aggregation (“CA”) can be used in NR and LTE systems to improve UE transmit receive data rate. With CA, the UE can operate initially on a single serving cell called a primary cell (“PCell”). The PCell can be operated on a component carrier (“CC”) in a frequency band. The UE can then be configured by the network with one or more secondary serving cells (“SCells”). Each SCell can correspond to a CC in the same frequency band (intra-band CA) or different frequency band (inter-band CA) from the frequency band of the CC corresponding to the PCell. For the UE to transmit/receive data on the SCells, for example, by receiving downlink shared channel (“DL-SCH”) information on a physical downlink shared channel (“PDCCH”) or by transmitting uplink shared channel (“UL-SCH”) on a physical uplink shared channel (“PUSCH”), the SCells need to be activated by the network. The SCells can also be deactivated and later reactivated as needed via activation/deactivation signaling.

SUMMARY

According to some embodiments, a method of operating a communication device in a communications network is provided. The method includes monitoring physical downlink control channel, PDCCH, candidates on a primary cell, PCell, for PCell assignments. The method can further include determining a maximum number of monitoring elements based on at least one of a higher layer configuration related to secondary cell, SCell, to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell. The method can further include responsive to determining the maximum number of monitoring elements, monitoring PDCCH candidates on the SCell based on the maximum number of monitoring elements.

According to other embodiments, a method of operating a network node in a communications network is provided. The method includes determining whether a communication device in the communications network is configured to monitor physical downlink control channel, PDCCH, candidates on a secondary cell, SCell, for primary cell, PCell, assignments. The method can further include determining a maximum number of monitoring elements that the communication device will use when monitoring the PDCCH candidates on the SCell based on at least one of a higher layer configuration related to SCell to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell. The method can further include determining a set of PDCCH candidates on the SCell based on the maximum number of monitoring elements. The method can further include transmitting SCell assignments or the PCell assignments on the set of PDCCH candidates on the SCell.

According to other embodiments, a communication device configured to operate in a communications network is provided. The communication device includes processing circuitry and memory coupled to the processing circuitry. The memory can have instructions stored therein that are executable by the processing circuitry to cause the communication device to perform operations. The operations include monitoring physical downlink control channel, PDCCH, candidates on a primary cell, PCell, for PCell assignments. The operations can further include determining a maximum number of monitoring elements based on at least one of a higher layer configuration related to secondary cell, SCell, to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell. The operations can further include, responsive to determining the maximum number of monitoring elements, monitoring PDCCH candidates on the SCell based on the maximum number of monitoring elements.

According to other embodiments, a network node configured to operate in a communications is provided. The network node includes processing circuitry and memory coupled to the processing circuitry. The memory can have instructions stored therein that are executable by the processing circuitry to cause the network node to perform operations. The operations can include determining whether a communication device in the communications network is configured to monitor physical downlink control channel, PDCCH, candidates on a secondary cell, SCell, for primary cell, PCell, assignments. The method can further include determining a maximum number of monitoring elements that the communication device will use when monitoring the PDCCH candidates on the SCell based on at least one of a higher layer configuration related to SCell to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell. The method can further include determining a set of PDCCH candidates on the SCell based on the maximum number of monitoring elements. The operations can further include, transmitting SCell assignments or the PCell assignments on the set of PDCCH candidates on the SCell.

According to other embodiments, a communication device configured to operate in a communications network is provided. The communication device is adapted to perform operations. The operations include monitoring physical downlink control channel, PDCCH, candidates on a primary cell, PCell, for PCell assignments. The operations further include, determining a maximum number of monitoring elements based on at least one of a higher layer configuration related to secondary cell, SCell, to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell. The operations further include, responsive to determining the maximum number of monitoring elements, monitoring PDCCH candidates on the SCell based on the maximum number of monitoring elements.

According to other embodiments, a network node configured to operate in a communications network is provided. The network node is adapted to perform operations. The operations can include determining whether a communication device in the communications network is configured to monitor physical downlink control channel, PDCCH, candidates on a secondary cell, SCell, for primary cell, PCell, assignments. The method can further include determining a maximum number of monitoring elements that the communication device will use when monitoring the PDCCH candidates on the SCell based on at least one of a higher layer configuration related to SCell to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell. The method can further include determining a set of PDCCH candidates on the SCell based on the maximum number of monitoring elements The operations can further include transmitting SCell assignments or the PCell assignments on the set of PDCCH candidates on the SCell.

According to other embodiments, a computer program is provided. The computer program includes program code to be executed by processing circuitry of a communication device configured to operate in a communications network. Execution of the program code causes the communication device to perform operations. The operations include monitoring physical downlink control channel, PDCCH, candidates on a primary cell, PCell, for PCell assignments. The operations can further include determining a maximum number of monitoring elements based on at least one of a higher layer configuration related to secondary cell, SCell, to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell. The operations can further include, responsive to determining the maximum number of monitoring elements, monitoring PDCCH candidates on the SCell based on the maximum number of monitoring elements.

According to other embodiments, a computer program is provided. The computer program can include program code to be executed by processing circuitry of a network node configured to operate in a communications network. Execution of the program code causes the network node to perform operations. The operations include determining whether a communication device in the communications network is configured to monitor physical downlink control channel, PDCCH, candidates on a secondary cell, SCell, for primary cell, PCell, assignments. The method can further include determining a maximum number of monitoring elements that the communication device will use when monitoring the PDCCH candidates on the SCell based on at least one of a higher layer configuration related to SCell to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell. The method can further include determining a set of PDCCH candidates on the SCell based on the maximum number of monitoring elements The operations can further include transmitting SCell assignments or the PCell assignments on the set of PDCCH candidates on the SCell.

According to other embodiments, a computer program product is provided. The computer program product can include a non-transitory storage medium including program code to be executed by processing circuitry of a communication device configured to operate in a communications network. Execution of the program code causes the communication device to perform operations. The operations can include monitoring physical downlink control channel, PDCCH, candidates on a primary cell, PCell, for PCell assignments. The operations can further include determining a maximum number of monitoring elements based on at least one of a higher layer configuration related to secondary cell, SCell, to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell. The operations can further include, responsive to determining the maximum number of monitoring elements, monitoring PDCCH candidates on the SCell based on the maximum number of monitoring elements.

According to other embodiments, a computer program product is provided. The computer program product can include a non-transitory storage medium including program code to be executed by processing circuitry of a network node configured to operate in a communications network. Execution of the program code causes the network node to perform operations. The operations include determining whether a communication device in the communications network is configured to monitor physical downlink control channel, PDCCH, candidates on a secondary cell, SCell, for primary cell, PCell, assignments. The method can further include determining a maximum number of monitoring elements that the communication device will use when monitoring the PDCCH candidates on the SCell based on at least one of a higher layer configuration related to SCell to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell. The method can further include determining a set of PDCCH candidates on the SCell based on the maximum number of monitoring elements The operations can further include transmitting SCell assignments or the PCell assignments on the set of PDCCH candidates on the SCell.

Various embodiments described herein, allow for defining PDCCH blind decodes (“BD”)/control channel element (“CCE”) limits, which can enable a communication system to operate with improved network efficiency (e.g., due to improved control channel signaling flexibility) with reduced complexity and/or power consumption for communication devices.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate certain non-limiting embodiments of inventive concepts. In the drawings:

FIG. 1 is a schematic diagram illustrating an example of a 5^(th) generation (“5G”) network;

FIG. 2 is a table illustrating an example of blind decoding and control channel element allocation for different cells;

FIG. 3 is a diagram illustrating an example of a dynamic spectrum sharing (“DSS”) scenario;

FIG. 4 is a table illustrating an example of blind decoding allocation for different cells when there is no SCell to PCell scheduling and no multi-TRP;

FIG. 5 is a table illustrating an example of blind decoding allocation for different cells when there is no SCell to PCell scheduling and multi-TRP with γ=2;

FIG. 6 is a table illustrating an example of blind decoding allocation for different cells when there is SCell to PCell scheduling and no multi-TRP according to some embodiments;

FIG. 7 is a table illustrating an example of blind decoding allocation for different cells when there is SCell to PCell scheduling and multi-TRP with γ=2 according to some embodiments;

FIG. 8 is a table illustrating another example of blind decoding allocation for different cells when there is SCell to PCell scheduling and multi-TRP with γ=2 according to some embodiments;

FIG. 9 is a block diagram illustrating an example of a communication device in accordance with some embodiments;

FIG. 10 is a block diagram illustrating an example of a radio access network (“RAN”) node in accordance with some embodiments;

FIG. 11 is a block diagram illustrating an example of a core network (“CN”) node in accordance with some embodiments;

FIGS. 12-14 are flow charts illustrating examples of operations performed by a communication device in accordance with some embodiments;

FIG. 15 is a flow chart illustrating examples of operations performed by a network node in accordance with some embodiments;

FIG. 16 is a block diagram of a wireless network in accordance with some embodiments;

FIG. 17 is a block diagram of a user equipment in accordance with some embodiments;

FIG. 18 is a block diagram of a virtualization environment in accordance with some embodiments;

FIG. 19 is a block diagram of a telecommunication network connected via an intermediate network to a host computer in accordance with some embodiments;

FIG. 20 is a block diagram of a host computer communicating via a base station with a user equipment over a partially wireless connection in accordance with some embodiments;

FIG. 21 is a block diagram of methods implemented in a communication system including a host computer, a base station, and a user equipment in accordance with some embodiments;

FIG. 22 is a block diagram of methods implemented in a communication system including a host computer, a base station, and a user equipment in accordance with some embodiments;

FIG. 23 is a block diagram of methods implemented in a communication system including a host computer, a base station, and a user equipment in accordance with some embodiments; and

FIG. 24 is a block diagram of methods implemented in a communication system including a host computer, a base station, and a user equipment in accordance with some embodiments.

DETAILED DESCRIPTION

Inventive concepts will now be described more fully hereinafter with reference to the accompanying drawings, in which examples of embodiments of inventive concepts are shown. Inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of present inventive concepts to those skilled in the art. It should also be noted that these embodiments are not mutually exclusive. Components from one embodiment may be tacitly assumed to be present/used in another embodiment.

For new radio (“NR”) carrier aggregation (“CA”), cross-carrier scheduling (“CCS”) can be specified using the following framework. First, a UE can have a primary serving cell (“PCell”) and can be configured with one or more secondary serving cells (“SCells”). Second, for a given SCell with SCell index X, if the SCell is configured with a ‘scheduling cell’ with cell index Y (cross-carrier scheduling) the SCell X can be referred to as the ‘scheduled cell;’ the UE can monitor downlink (“DL”) physical downlink control channel (“PDCCH”) on the scheduling cell Y for assignments/grants scheduling physical downlink shared channel (“PDSCH”)/physical uplink shared channel (“PUSCH”) corresponding to SCell X; and the PDSCH/PUSCH corresponding to SCell X cannot be scheduled for the UE using a serving cell other than scheduling cell Y. Otherwise, the SCell X is the scheduling cell for SCell X (same-carrier scheduling); the UE can monitor DL PDCCH on SCell X for assignments/grants scheduling PDSCH/PUSCH corresponding to SCell X; and the PDSCH/PUSCH corresponding to SCell X cannot be scheduled for the UE using a serving cell other than SCell X. Third, a SCell cannot be configured as a scheduling cell for the primary cell. The primary cell is always its own scheduling cell.

Dual connectivity (“DC”) can be used in NR and LTE systems to improve UE transmit receive data rate. With DC, the UE can operate a master cell group (“MCG”) and a secondary cell group (“SCG”). Each cell group can have one or more serving cells. The MCG cell, operating on the primary frequency, in which the UE either performs the initial connection establishment procedure or initiates the connection re-establishment procedure is referred to as the PCell. The SCG cell in which the UE performs random access when performing the Reconfiguration with Sync procedure is referred to as the primary SCG cell (“PSCell”).

In some examples, the term “primary cell” or “primary serving cell” can refer to PCell for a UE not configured with DC, and can refer to PCell of MCG or PSCell of SCG for a UE configured with DC.

In the 3^(rd) Generation Partnership Project (“3GPP”) NR standard, downlink control information (“DCI”) is received over the PDCCH. The PDCCH may carry DCI in messages with different formats. DCI format 0_0, 0_1, and 0-2 are DCI messages used to convey uplink grants to the UE for transmission of the physical layer data channel in the uplink (PUSCH) and DCI format 1_0, 1_1, and 1-2 are used to convey downlink grants for transmission of the physical layer data channel in the downlink (PDSCH). Other DCI formats (2_0, 2_1, 2_2 and 2_3, etc) are used for other purposes such as transmission of slot format information, reserved resource, transmit power control information.

A PDCCH candidate can be searched within a common or UE-specific search space which is mapped to a set of time and frequency resources referred to as a control resource set (“CORESET”). The search spaces within which PDCCH candidates must be monitored are configured to the UE via radio resource control (“RRC”) signaling. A monitoring periodicity can also be configured for different PDCCH candidates. In any particular slot the UE may be configured to monitor multiple PDCCH candidates in multiple search spaces, which may be mapped to one or more CORESETs. PDCCH candidates may be monitored multiple times in a slot, once every slot, or once in multiple of slots.

The smallest unit used for defining CORESETs is a Resource Element Group (“REG”), which can be defined as spanning 1 physical resource block (“PRB”)×1 orthogonal frequency division multiplexing (“OFDM”) symbol in frequency and time. Each REG can include demodulation reference signals (“DM-RS”) to aid in the estimation of the radio channel over which that REG was transmitted. When transmitting the PDCCH, a precoder can be used to apply weights at the transmit antennas e.g. based on some knowledge of the radio channel prior to transmission. It is possible to improve channel estimation performance at the UE by estimating the channel over multiple REGs that are proximate in time and frequency if the precoder used at the transmitter for the REGs is not different. To assist the UE with channel estimation the multiple REGs can be grouped together to form a REG bundle and the REG bundle size for a CORESET can be indicated to the UE. The UE may assume that any precoder used for the transmission of the PDCCH is the same for all the REGs in the REG bundle. A REG bundle may include 2, 3, or 6 REGs.

A control channel element (“CCE”) can include 6 REGs. The REGs within a CCE may either be contiguous or distributed in frequency. When the REGs are distributed in frequency, the CORESET can be referred to as using an interleaved mapping of REGs to a CCE and if the REGs are not distributed in frequency, a non-interleaved mapping can be used.

A PDCCH candidate may span 1, 2, 4, 8, or 16 CCEs. The number of aggregated CCEs used is referred to as the aggregation level for the PDCCH candidate.

A hashing function can be used to determine the CCEs corresponding to PDCCH candidates that a UE must monitor within a search space set. The hashing can be done differently for different UEs so that the CCEs used by the UEs are randomized and the probability of collisions between multiple UEs for which PDCCH messages are included in a CORESET is reduced.

Blind decoding of potential PDCCH transmissions can be attempted by the UE in each of the configured PDCCH candidates within a slot. The complexity incurred at the UE to do this depends on number of blind decoding attempts and the number of CCEs which need to be processed.

In order to manage complexity, limits on the total number of CCEs and/or total number of blind decodes to be processed by the UE can be used for BD/CCE partitioning based on UE capability for NR operation with multiple component carriers.

In current NR, a scheduled cell may have only one scheduling cell. A primary cell may always be a scheduling cell and another cell may not be a scheduling cell for the primary cell. A scheduling cell carries downlink control information (“DCI”) scheduling itself and can carry DCI scheduling other cells. When a UE is configured with cross-carrier scheduling, the physical downlink control channel (“PDCCH”) carrying the DCI format for scheduling the physical downlink shared channel (“PDSCH”)/physical uplink shared channel (“PUSCH”) on the scheduled cell is sent on a scheduling cell. In these examples, a carrier indicator field can be included in the DCI formats (e.g. non-fallback DCI formats such as 0-1/1-1 for scheduling PUSCH/PDSCH) on the scheduling cell. Higher layer configuration indicates the linkages between the scheduled/scheduling cells, the CIF value to monitor, and the corresponding search space configuration for monitoring DCI formats of a scheduled cell on the scheduling cell.

A user equipment (“UE”) (also referred to herein as a communication device) can be configured with up to three core resource sets (“CORESETs”) and up to ten search spaces for each DL BWP in a scheduling cell. NW can configure the search spaces that a UE monitors according to some constraints or limits on maximum number of blind decodes and control channel elements.

In some examples, for a single serving cell case, the maximum number of monitored PDCCH candidates per slot of a DL BWP is given by 44, 36, 22, 20 for SCS 15, 30, 60 and 120 kHz, respectively. In additional or alternative examples, the maximum number of non-overlapped CCEs per slot of a DL BWP is given by 56, 56, 48, 32 for SCS 15, 30, 60 and 120 kHz, respectively.

For carrier aggregation (“CA”) examples with up to a first number (e.g. four) of aggregated carriers, for each scheduled cell, the maximum number of monitored PDCCH candidates per slot of a DL BWP of a scheduling cell is given by 44, 36, 22, 20 for scheduling cell SCS 15, 30, 60 and 120 kHz, respectively. In additional or alternative CA examples, for each scheduled cell, the maximum number of non-overlapped CCEs per slot of a DL BWP of a scheduling cell is given by 56, 56, 48, 32 for scheduling cell SCS 15, 30, 60 and 120 kHz, respectively.

For CA examples with more than a first number (e.g. four) of aggregated carriers, for each scheduled cell, the maximum number of monitored PDCCH candidates per slot of a DL BWP of a scheduling cell, and the maximum number of non-overlapped CCEs per slot of a DL BWP of a scheduling cell is given by a proportional split which can be based on 1) a CA BD/CCE parameter (e.g. reported by the UE for CA case or configured by NW based on the reported capability by the UE for NR-DC case), 2) number of cells configured for the UE, and 3) number of carriers with corresponding numerology.

If the number of aggregated carriers is larger than the CA BD/CCE parameter (denoted by N_(cells) ^(cap)), then the BDs are proportionally split. Otherwise, the single serving cell limits apply for each carrier.

The proportional split is described below.

If a UE is configured with N_(cells) ^(DL,μ) downlink cells with DL BWPs having SCS configuration μ, where

${{\sum\limits_{\mu = 0}^{3}N_{cells}^{{DL},\mu}} > N_{cells}^{cap}},$

a DL BWP of an activated cell is the active DL BWP of the activated cell, and a DL BWP of a deactivated cell is the DL BWP with index provided by firstActiveDownlinkBWP-Id for the deactivated cell, the UE is not required to monitor more than

$M_{PDCCH}^{{total},{slot},\mu} = \left\lfloor {{N_{cells}^{cap} \cdot M_{PDCCH}^{\max,{slot},\mu} \cdot N_{cells}^{{DL},\mu}}/{\sum\limits_{j = 0}^{3}N_{cells}^{{DL},j}}} \right\rfloor$

PDCCH candidates or more than

$C_{PDCCH}^{{total},{slot},\mu} = \left\lfloor {{N_{cells}^{cap} \cdot M_{PDCCH}^{\max,{slot},\mu} \cdot N_{cells}^{{DL},\mu}}/{\sum\limits_{j = 0}^{3}N_{cells}^{{DL},j}}} \right\rfloor$

non-overlapped CCEs per slot on the active DL BWP(s) of scheduling cell(s) from the N_(cells) ^(DL,μ) downlink cells.

Here N_(cells) ^(cap) is CA BD/CCE parameter (e.g. reported by the UE for CA case or configured by NW for MCG and for SCG based on the reported capability by the UE for NR-DC case), C_(PDCCH) ^(max,slot,μ) and M_(PDCCH) ^(max,slot,μ) are the maximum number of non-overlapped CCEs per slot of a DL BWP and the maximum number of monitored PDCCH candidates per slot of a DL BWP for single cell case with SCS μ (μ=x corresponds to SCS of 15*2^(x) Hz), respectively.

The NW can configure BD/CCEs for the UE satisfying the above constraints.

In some examples, a UE is configured with a primary cell with 15 kHz numerology and four SCells with 30 kHz numerology (each is self-scheduled), and the UE indicates a pdcch-BlindDetectionCA capability of N_(cells) ^(cap)=4.

Then for the 15 kHz (μ=0):

M _(PDCCH) ^(total,slot,μ)=└4×4×⅕┘=35

C _(PDCCH) ^(total,slot,μ)=└4×56×⅕┘=44

And for the 30 kHz (μ=1):

M _(PDCCH) ^(total,slot,μ)=└4×36×⅘┘=115

C _(PDCCH) ^(total,slot,μ)=└4×56×⅘┘=179

Thus, for the 15 kHz primary cell, the UE can be configured with up to 35 BDs with maximum of 44 non-overlapped CCEs per slot. For the 30 kHz serving cells, the UE can be configured with an aggregate (across all four SCells) of maximum of 115 BDs and maximum of 179 non-overlapped CCEs per slot, and with a per-carrier limit of 36 BDs and 56 CCEs per slot of a carrier. An example BD/CCE allocation for the different cells is shown in the table of FIG. 2

In case of cross-carrier scheduling, for a scheduled cell, the BDs/CCEs limits are determined based on the numerology of the scheduling cell and are applied per slot of the scheduling cell.

PDCCH BD/CCE limits considering multi-TRP operation and carrier aggregation in the current system are described below.

With multi-TRP operation a UE may support operation with a first set of N_(cells,0) ^(DL) serving cells where the UE is either not provided a higher layer parameter CORESETPoolIndex or is provided CORESETPoolIndex with a single value for all CORESETs on all DL BWPs of each scheduling cell from the first set of serving cells, and a second set of N_(cells,1) ^(DL) serving cells where the UE is not provided CORESETPoolIndex or is provided CORESETPoolIndex with a value 0 for a first CORESET, and with a value 1 for a second CORESET on any DL BWP of each scheduling cell from the second set of serving cells.

Such a UE can determine, for the purpose of reporting pdcch-BlindDetectionCA, a number of serving cells as N_(cells,0) ^(DL)+R·N_(cells,1) ^(DL) where R is a value reported by the UE capability signalling (e.g. R=1 or R=2).

If a UE indicates in UE-NR-Capability a carrier aggregation capability larger than 4 serving cells and the UE is not provided monitoringCapabilityConfig-r16 for any downlink cell or if the UE is provided monitoringCapabilityConfig-r16=r15monitoringcapability for all downlink cells where the UE monitors PDCCH, the UE includes in UE-NR-Capability an indication for a maximum number of PDCCH candidates and for a maximum number of non-overlapped CCEs the UE can monitor per slot when the UE is configured for carrier aggregation operation over more than 4 cells. When a UE is not configured for NR-DC operation, the UE determines a capability to monitor a maximum number of PDCCH candidates and a maximum number of non-overlapped CCEs per slot that corresponds to N_(cells) ^(cap) downlink cells, where N_(cells) ^(cap) is N_(cells,0) ^(DL)+R·N_(cells,1) ^(DL) if the UE does not provide pdcch-BlindDetectionCA where N_(cells,0) ^(DL)+N_(cells,1) ^(DL) is the number of configured downlink serving cells. Otherwise, N_(cells) ^(cap) is the value of pdcch-BlindDetectionCA.

The limits for PDCCH BD candidates are described below.

If Σ_(μ=0) ³(N_(cells,0) ^(DL,μ)+γ·N_(cells,1) ^(DL,μ))≤N_(cells) ^(cap), for a scheduling cell having SCS configuration μ, UE is not required to monitor more than M_(PDCCH) ^(total,slot,μ) PDCCH candidates on the active DL BWP of the scheduling cell, where

M _(PDCCH) ^(total,slot,μ) =M _(PDCCH) ^(max,slot,μ) for N _(cells,0) ^(DL,μ)

M _(PDCCH) ^(total,slot,μ) =γ·M _(PDCCH) ^(max,slot,μ) for N _(cells,1) ^(DL,μ)

If Σ_(μ=0) ³(N_(cells,0) ^(DL,μ)+γ·N_(cells,1) ^(DL,μ))>N_(cells) ^(cap), for scheduling cell(s) having SCS configuration μ from N_(cells,0) ^(DL,μ)+N_(cells,1) ^(DL,μ) downlink cells, UE is not required to monitor more than a total of M_(PDCCH) ^(total,slot,μ) PDCCH candidates on the active DL BWP(s) of the scheduling cell(s) where

$M_{PDCCH}^{{total},{slot},\mu} = \left\lfloor {{N_{cells}^{cap} \cdot M_{PDCCH}^{\max,{slot},\mu} \cdot \left( {N_{{cells},0}^{{DL},\mu} + {\gamma \cdot N_{{cells},1}^{{DL},\mu}}} \right)}/{\sum\limits_{j = 0}^{3}\left( {N_{{cells},0}^{{DL},j} + {\gamma \cdot N_{{cells},1}^{{DL},j}}} \right)}} \right\rfloor$

and, for each scheduled cell, UE is not required to monitor more than below BDs on the active DL BWP of the scheduling cell having SCS configuration μ min(M_(PDCCH) ^(max,slot,μ),M_(PDCCH) ^(total,slot,μ)) for N_(cells,0) ^(DL,μ)

min(γ·M _(PDCCH) ^(max,slot,μ) ,M _(PDCCH) ^(total,slot,μ)) for N _(cells,1) ^(DL,μ)

min(M _(PDCCH) ^(max,slot,μ) ,M _(PDCCH) ^(total,slot,μ))

for same CORESETPoolIndex value N_(cells,1) ^(DL,μ)

If the UE does not report UE capability pdcch-BlindDetectionCA or is not provided higher layer parameter BDFactorR, γ=R. If the UE reports pdcch-BlindDetectionCA, the UE can be indicated by higher later parameter BDFactorR to set either γ=1 or γ=R

M_(PDCCH) ^(total,slot,μ) is a per scheduling cell limit when N_(cells) ^(cap) limit is not exceeded but it becomes a ‘overall limit’ for all scheduling cells with same SCS when N_(cells) ^(cap) limit is exceeded.

Enhanced cross-carrier scheduling improves the current CA system by introducing the possibility for PDCCH on an Scell to schedule PDSCH/PUSCH on a PCell. This is especially useful for a DSS scenario as shown in FIG. 3 below where some of the PDCCH load from Pcell (operated on a DSS carrier with less time-frequency resources) is offloaded to a SCell.

FIG. 3 illustrates a dynamic spectrum sharing (“DSS”) scenario. In this example, slots are illustrated for a NR PCell/PSCell for a DL CA capable communication device (also referred to as user equipment (“UE”)) operated on carrier where the same carrier is also used for serving LTE users via dynamic spectrum sharing. Slots are also illustrated for another NR SCell configured for the same UE

As illustrated in FIG. 3 , when a NR PCell is operated on the same carrier on which legacy LTE users are served, the opportunities for transmitting PDCCH are significantly limited due to the need to avoid overlap with LTE transmissions (e.g. LTE PDCCH, LTE PDSCH, LTE CRS).

For a UE supporting DL CA, providing the ability to use SCell PDCCH to schedule primary cell PDSCH/PUSCH (e.g. as shown by red arrows in the figure) can help in reducing the loading of primary cell PDCCH.

The example shown in FIG. 3 is for a CA scenario for a DL CA capable UE with NR primary cell on FDD carriers with 15 kHz SCS and NR SCell on TDD carrier with 30 kHz SCS. This is just one of the expected scenarios. Other scenarios (e.g. SCell being operated on FDD band) with 15 kHz SCS are also possible.

In some examples, certain limits on blind decodes (“BDs”) and non-overlapping control channel elements (“CCEs”) used for monitoring PDCCH are defined to enable low complexity UE implementation. The limits are defined based on CA and multi-TRP configuration for the UE, but they do not consider the new scheduling combinations (e.g. allowing an SCell to schedule PDSCH/PUSCH on primary cell) introduced with enhanced CCS framework.

Various embodiments described herein provide new determinations for max BDs and max control channel elements CCEs used for monitoring PDCCH when enhanced CCS framework is used. In some embodiments, associated signaling (e.g. NW to UE RRC signaling, UE capability indication) is provided for operating a gNB and/or UE using such BD/CCE limits.

FIG. 9 is a block diagram illustrating elements of a communication device 900 (also referred to as a mobile terminal, a mobile communication terminal, a wireless device, a wireless communication device, a wireless terminal, mobile device, a wireless communication terminal, user equipment, UE, a user equipment node/terminal/device, etc.) configured to provide wireless communication according to embodiments of inventive concepts. (Communication device 900 may be provided, for example, as discussed below with respect to wireless device 4110 of FIG. 16 .) As shown, communication device 900 may include an antenna 907 (e.g., corresponding to antenna 4111 of FIG. 16 ), and transceiver circuitry 901 (also referred to as a transceiver, e.g., corresponding to interface 4114 of FIG. 16 ) including a transmitter and a receiver configured to provide uplink and downlink radio communications with a base station(s) (e.g., corresponding to network node 4160 of FIG. 16 , also referred to as a RAN node) of a radio access network. Communication device 900 may also include processing circuitry 903 (also referred to as a processor, e.g., corresponding to processing circuitry 4120 of FIG. 16 ) coupled to the transceiver circuitry, and memory circuitry 905 (also referred to as memory, e.g., corresponding to device readable medium 4130 of FIG. 16 ) coupled to the processing circuitry. The memory circuitry 905 may include computer readable program code that when executed by the processing circuitry 903 causes the processing circuitry to perform operations according to embodiments disclosed herein. According to other embodiments, processing circuitry 903 may be defined to include memory so that separate memory circuitry is not required. Communication device 900 may also include an interface (such as a user interface) coupled with processing circuitry 903, and/or communication device UE may be incorporated in a vehicle.

As discussed herein, operations of communication device 900 may be performed by processing circuitry 903 and/or transceiver circuitry 901. For example, processing circuitry 903 may control transceiver circuitry 901 to transmit communications through transceiver circuitry 901 over a radio interface to a radio access network node (also referred to as a base station) and/or to receive communications through transceiver circuitry 901 from a RAN node over a radio interface. Moreover, modules may be stored in memory circuitry 905, and these modules may provide instructions so that when instructions of a module are executed by processing circuitry 903, processing circuitry 903 performs respective operations.

FIG. 10 is a block diagram illustrating elements of a radio access network (“RAN”) node 1000 (also referred to as a network node, base station, eNodeB/eNB, gNodeB/gNB, etc.) of a Radio Access Network (RAN) configured to provide cellular communication according to embodiments of inventive concepts. (RAN node 1000 may be provided, for example, as discussed below with respect to network node 4160 of FIG. 16 .) As shown, the RAN node 1000 may include transceiver circuitry 1001 (also referred to as a transceiver, e.g., corresponding to portions of interface 4190 of FIG. 16 ) including a transmitter and a receiver configured to provide uplink and downlink radio communications with mobile terminals. The RAN node 1000 may include network interface circuitry 1007 (also referred to as a network interface, e.g., corresponding to portions of interface 4190 of FIG. 16 ) configured to provide communications with other nodes (e.g., with other base stations) of the RAN and/or core network CN. The RAN node 1000 may also include processing circuitry 1003 (also referred to as a processor, e.g., corresponding to processing circuitry 4170) coupled to the transceiver circuitry, and memory circuitry 1005 (also referred to as memory, e.g., corresponding to device readable medium 4180 of FIG. 16 ) coupled to the processing circuitry. The memory circuitry 1005 may include computer readable program code that when executed by the processing circuitry 1003 causes the processing circuitry to perform operations according to embodiments disclosed herein. According to other embodiments, processing circuitry 1003 may be defined to include memory so that a separate memory circuitry is not required.

As discussed herein, operations of the RAN node 1000 may be performed by processing circuitry 1003, network interface 1007, and/or transceiver 1001. For example, processing circuitry 1003 may control transceiver 1001 to transmit downlink communications through transceiver 1001 over a radio interface to one or more mobile terminals UEs and/or to receive uplink communications through transceiver 1001 from one or more mobile terminals UEs over a radio interface. Similarly, processing circuitry 1003 may control network interface 1007 to transmit communications through network interface 1007 to one or more other network nodes and/or to receive communications through network interface from one or more other network nodes. Moreover, modules may be stored in memory 1005, and these modules may provide instructions so that when instructions of a module are executed by processing circuitry 1003, processing circuitry 1003 performs respective operations (e.g., operations discussed below with respect to Example Embodiments relating to network nodes).

According to some other embodiments, a network node may be implemented as a core network CN node without a transceiver. In such embodiments, transmission to a wireless communication device UE may be initiated by the network node so that transmission to the wireless communication device UE is provided through a network node including a transceiver (e.g., through a base station or RAN node). According to embodiments where the network node is a RAN node including a transceiver, initiating transmission may include transmitting through the transceiver.

FIG. 11 is a block diagram illustrating elements of a core network (“CN”) node 1100 (e.g., an SMF node, an AMF node, an AUSF node, a UDM node, etc.) of a communication network configured to provide cellular communication according to embodiments of inventive concepts. As shown, the CN node 1100 may include network interface circuitry 1107 (also referred to as a network interface) configured to provide communications with other nodes of the core network and/or the RAN. The CN node 1100 may also include a processing circuitry 1103 (also referred to as a processor) coupled to the network interface circuitry, and memory circuitry 1105 (also referred to as memory) coupled to the processing circuitry. The memory circuitry 1105 may include computer readable program code that when executed by the processing circuitry 1103 causes the processing circuitry to perform operations according to embodiments disclosed herein. According to other embodiments, processing circuitry 1103 may be defined to include memory so that a separate memory circuitry is not required.

As discussed herein, operations of the CN node 1100 may be performed by processing circuitry 1103 and/or network interface circuitry 1107. For example, processing circuitry 1103 may control network interface circuitry 1107 to transmit communications through network interface circuitry 1107 to one or more other network nodes and/or to receive communications through network interface circuitry from one or more other network nodes. Moreover, modules may be stored in memory 1105, and these modules may provide instructions so that when instructions of a module are executed by processing circuitry 1103, processing circuitry 1103 performs respective operations.

In some embodiments, a UE is configured with an SCell (also referred to herein as a special SCell (“sSCell”)) such that PDSCH/PUSCH resource assignments for primary cell can be assigned via a PDCCH received on the sSCell. For such a UE, the max BD/CCE limits for PDCCH monitoring on the primary cell, the sSCell and optionally one or more additional downlink cells can be determined.

In some embodiments, if a UE is configured with sSCell with SCS configuration μ_(sp), the PDCCH BD limits are determined as described below.

If Σ_(μ=0) ³(N_(cells,0) ^(DL,μ)+γ·N_(cells,1) ^(DL,μ))+t·X≤N_(cells) ^(cap), then for a scheduling cell having SCS configuration μ, the UE is not required to monitor more than M_(PDCCH) ^(total,slot,μ) PDCCH candidates on the active DL BWP of the scheduling cell, where M_(PDCCH) ^(total,slot,μ)=M_(PDCCH) ^(max,slot,μ)+t·β·q·M_(PDCCH) ^(max,slot,μ) ^(sp) if the scheduling cell belongs to set of downlink cells N_(cells,0) ^(DL,μ) and M_(PDCCH) ^(total,slot,μ)=γ·M_(PDCCH) ^(max,slot,μ)+t·β·q·M_(PDCCH) ^(max,slot,μ) ^(sp) if the scheduling cell belongs to set of downlink cells N_(cells,1) ^(DL,μ).

If Σ_(μ=0) ³(N_(cells,0) ^(DL,μ)+γ·N_(cells,1) ^(DL,μ))+t·X≤N_(cells) ^(cap), then for scheduling cell(s) having SCS cells configuration μ, from N_(cells,0) ^(DL,μ)+N_(cells,1) ^(DL,μ) downlink cells, UE is not required to monitor more than a total of M_(PDCCH) ^(total,slot,μ) PDCCH candidates on the active DL BWP(s) of the scheduling cell(s) where if μ=μ_(sp) then:

M _(PDCCH) ^(total,slot,μ) =└N _(cells) ^(cap) ·M _(PDCCH) ^(max,slot,μ)·(N _(cells,0) ^(DL,μ) +γ·N _(cells,1) ^(DL,μ) +t·X)/(Σ_(j=0) ³(N _(cells,0) ^(DL,j) +γ·N _(cells,1) ^(DL,j))+t·X)┘;

otherwise,

M _(PDCCH) ^(total,slot,μ) =└N _(cells) ^(cap) ·M _(PDCCH) ^(max,slot,μ)·(N _(cells,0) ^(DL,μ) +γ·N _(cells,1) ^(DL,μ))/(Σ_(j=0) ³(N _(cells,0) ^(DL,j) +γ·N _(cells,1) ^(DL,j))+t·X)┘;

and, optionally in addition to the above conditions, for each scheduled cell, UE is not required to monitor more than below BDs on the scheduling cell having SCS configuration μ:min(M_(PDCCH) ^(max,slot,μ),M_(PDCCH) ^(total,slot,μ)) if the scheduling cell belongs to set of downlink cells N_(cells,0) ^(DL,μ); min(γ·M_(PDCCH) ^(max,slot,μ),M_(PDCCH) ^(total,slot,μ)) if the scheduling cell belongs to set of downlink cells N_(cells,1) ^(DL,μ); or min(M_(PDCCH) ^(max,slot,μ),M_(PDCCH) ^(total,slot,μ)) for same CORESETPoolIndex value if the scheduling cell belongs to set of downlink cells N_(cells,1) ^(DL,μ).

β can be determined as: β=0 when the scheduling cell is not an sSCell; or β is set to value given by a parameter e.g. bdfactor_sSCell when scheduling cell is sSCell.

The parameter bdfactor_sSCell can be configured by higher layer signaling (e.g. RRC). Possible values for the parameter can be e.g. 0, 0.5, 1, 2. In some examples, the values for bdfactor_sSCell can be based on UE capability signaling.

X can determined as X=1 if higher layers configure bdfactor_sSCell with non-zero value, otherwise X=0.

t is a scaling factor that can be optionally linked to multi-TRP configuration for the UE, and can determined by one of the following alternatives: 1) t=1 (or not used in the equations above); 2) t=γ if the sSCell is part of N_(cells,1) ^(DL,μ) and t=1 if the sSCell is part of N_(cells,0) ^(DL,μ); 3) t=γ if the PCell is part of N_(cells,1) ^(DL,μ) and t=1 if the PCell is part of N_(cells,0) ^(DL,μ); or 4) t=γ if both the PCell and sScell are part of N_(cells,1) ^(DL,μ) and t=1 otherwise. In some examples, whether a UE supports one or more of the alternatives can be indicated by the UE via UE capability signaling.

q is an optional scaling factor that can be based on SCS combination of sSCell and primary cell and can be determined by one of the following alternatives: 1) q=1 (or not used in the equations above); 2)

$q = \left\lbrack \frac{2^{\mu}PCell}{2^{\mu_{sp}}} \right\rbrack$

where μ_(PCell) is the SCS configuration of the PCell; 3) if SCS of primary cell is <SCS of sSCell,

${q = \left\lbrack \frac{2^{\mu}PCell}{2^{\mu_{sp}}} \right\rbrack},$

otherwise q=1 (or not used in the equation).

In some embodiments, a cell can be part of N_(cells,0) ^(DL,μ) if it is not configured with multiple coreset pools for PDCCH monitoring, and can be part of N_(cells,1) ^(DL,μ) if it is configured with multiple coreset pools for PDCCH monitoring.

In some embodiments, whether the UE supports the above BD limit determination procedures can be indicated by the UE via UE capability indication bits. For example, the capability signaling can indicate whether it supports RRC configuration of bdfactor_sSCell. The capability indication bit(s) can be part of a UE capability used for indicating support of SCell to PCell scheduling (e.g., a carrier aggregation system in which PDCCH on a SCell is used to schedule PDSCH/PUSCH on a PCell).

In some embodiments, the above BD limit determination procedures can also be performed by replacing the parameter bdfactor_sSCell with higher layer parameter BDFactorR.

In some embodiments, a similar approach can also be used by the UE for determining the maximum number of non-overlapping CCEs used for PDCCH monitoring, for example, by replacing M_(PDCCH) ^(max,slot,μ) with C_(PDCCH) ^(max,slot,μ), and M_(PDCCH) ^(total,slot,μ) with C_(PDCCH) ^(total,slot,μ).

In some embodiments, a UE can perform operations. The operation can include monitoring PDCCH candidates on a primary cell for primary cell PDSCH/PUSCH assignments. The operations can further include monitoring PDCCH candidates on a first secondary cell (SCell) based on a maximum number of blind decoding candidates. The maximum number of blind decoding candidates can be a first value, if the PDCCH candidates on the first SCell are monitored for primary cell PDSCH/PUSCH assignments and a second value, if the PDCCH candidates on the first SCell are monitored only for PDSCH/PUSCH assignments for the first SCell. The first value can be based on one or more of the following: a first parameter determined from a higher layer configuration related to SCell to primary cell scheduling; and a second parameter related to the number of coreset pools configured for PDCCH monitoring. The operations can further include detecting a PDCCH on the first SCell with a PDSCH/PUSCH assignment for the primary cell. The operations can further include receiving PDSCH/transmitting PUSCH on the primary according to the detected PDSCH/PUSCH assignment.

In some examples, the first value can be the max PDCCH BD candidates when UE is configured with sScell (i.e., first Scell is the sSCell) as described using Approach 1 above; the second value can be max PDCCH BD candidates when UE is not configured with sSCell.

In additional or alternative examples, the first parameter can be the parameter β discussed above which is a scaling factor applied to a predefined maximum number of monitored PDCCH candidates per slot (M_(PDCCH) ^(max,slot,μ) ^(sp) ) described above (e.g. 36 when SCS of first SCell is 30 KHz, 44 when SCS of first SCell is 15 kHz).

In additional or alternative examples, the higher layer configuration can be the configuration bdfactor_sSCell discussed above.

In additional or alternative examples, the second parameter can be the parameter t discussed above which is a scaling factor that depends on number of coreset pools used for PDCCH monitoring on one of the first SCell, the primary cell or both first SCell and primary cell.

In additional or alternative embodiments, the operations can further include determining, the first value based on whether a first condition or a second condition is satisfied. The first and second condition can be related to a PDCCH blind decoding capability supported by the UE for carrier aggregation (CA) and determining, whether the first condition or the second condition is satisfied based on one or more of: the higher layer configuration and the second parameter.

In some examples, the “PDCCH blind decoding capability supported by the UE for carrier aggregation (CA)” can be N_(cells) ^(cap) discussed above; the first condition can be Σ_(μ=0) ³(N_(cells,0) ^(DL,μ)+γ·N_(cells,1) ^(DL,μ))+t·X≤N_(cells) ^(cap) discussed above; the second condition can be Σ_(μ=0) ³(N_(cells,0) ^(DL,μ)+γ·N_(cells,1) ^(DL,μ))+t·X>N_(cells) ^(cap) discussed above.

In additional or alternative embodiments, the operations can further include determining, the first value based on a third parameter which is a scaling factor based on SCS configuration of the primary cell and SCS configuration of the first SCell. In some examples, the third parameter is the parameter q discussed above.

In additional or alternative embodiments, the first value is determined based on one or more of following UE capability indications: signaling that indicates whether the higher layer parameter can be configured for the UE; signaling that indicates allowable values of higher layer parameter that can be configured for the UE; and signaling that indicates the applicable values for the second parameter.

In additional or alternative embodiments, the first value is larger than the second value

In additional or alternative embodiments, the operations further include monitoring the PDCCH candidates on the first SCell for PDSCH/PUSCH assignments for the first SCell; detecting a PDCCH on the first SCell with a PDSCH/PUSCH assignment for the first SCell; and receiving PDSCH/transmitting PUSCH on the first SCell according to the detected PDSCH/PUSCH assignment.

The tables in FIGS. 4-8 illustrate some non-limiting numerical examples for max PDCCH BDs. For these tables, four DL Cells including a PCell with 15 kHz SCS (denoted as P) and three SCells with 30 kHz SCS (denoted by S1, S2, S3) are assumed.

The column ‘scheduling’ indicates the scheduling combination. P->P implies PDCCH on primary cell assigning PDSCH/PUSCH on primary cell; S1->S1 implies PDCCH on SCell 1 assigning PDSCH/PUSCH on SCell 1 and son. S1->P implies PDCCH on SCell 1 assigning PDSCH/PUSCH on the primary cell.

The column ‘m-TRP’ indicates whether one or two coreset pools are assumed for the corresponding scheduling. ‘n’ implies only one coreset pool is assumed. ‘y’ implies two coreset pools. A value of γ=2 is assumed for PDCCH BD computation for multiple coreset pools case.

The column ‘max PDCCH BDs’ indicates the maximum number of PDCCH BD candidates for the corresponding scheduling combination. b1 for P->P, b2 for S1->S1, b3 for 52->S2 and so on. b5 is used for S1->P.

For SI->P row, the entry for column ‘m-trp’ lists the value of parameter t discussed above. N_(cells) ^(cap)=4 is assumed. q=1 is assumed. bdfactor_sSCell=1 is assumed.

FIG. 4 is a table illustrating an example of blind decoding allocation for different cells when there is no SCell to PCell scheduling and no multi-TRP;

FIG. 5 is a table illustrating an example of blind decoding allocation for different cells when there is no SCell to PCell scheduling and multi-TRP with γ=2;

FIG. 6 is a table illustrating an example of blind decoding allocation for different cells when there is SCell to PCell scheduling and no multi-TRP.

FIG. 7 is a table illustrating an example of blind decoding allocation for different cells when there is SCell to PCell scheduling and multi-TRP with γ=2.

FIG. 8 is a table illustrating another example of blind decoding allocation for different cells when there is SCell to PCell scheduling and multi-TRP with γ=2.

In some embodiments, additional PDCCH BDs for SCell to PCell scheduling are provided by ‘transferring’ certain BDs used for PCell self scheduling to sSCell for SCell to PCell scheduling. The number of BDs (or CCEs) transferred from being used for PCell self scheduling to the sSCell for SCell to PCell scheduling can be referred to herein as a transfer amount.

In some examples, a UE is configured with an SCell (hereinafter referred as sSCell or special SCell) such that PDSCH/PUSCH resource assignments for primary cell can be assigned via a PDCCH received on the sSCell. For such a UE, the max BD/CCE limits for PDCCH monitoring on the primary cell, the sSCell and optionally one or more additional downlink cells can be determined as described below.

If a UE is configured with sSCell with SCS configuration μ_(sp) and if Σ_(μ=0) ³(N_(cells,0) ^(DL,μ)+γ·N_(cells,1) ^(DL,μ))≤N_(cells) ^(cap), then for a scheduling cell having SCS configuration μ, the UE is not required to monitor more than M_(PDCCH) ^(total,slot,μ) PDCCH candidates on the active DL BWP of the scheduling cell, where M_(PDCCH) ^(total,slot,μ)=M_(PDCCH) ^(max,slot,μ)+a·Z if the scheduling cell belongs to set of downlink cells N_(cells,0) ^(DL,μ); or M_(PDCCH) ^(total,slot,μ)=γ·M_(PDCCH) ^(max,slot,μ)+a·Z if the scheduling cell belongs to set of downlink cells N_(cells,1) ^(DL,μ).

If a UE is configured with sSCell with SCS configuration μ_(sp) and if Σ_(μ=0) ³(N_(cells,0) ^(DL,μ)+γ·N_(cells,1) ^(DL,μ))>N_(cells) ^(cap), then for scheduling cells having SCS configuration μ from N_(cells,0) ^(DL,μ)+N_(cells,1) ^(DL,μ) downlink cells, the UE is not required to monitor more than a total of M_(PDCCH) ^(total,slot,μ) PDCCH candidates on the active DL BWP(s) of the scheduling cell(s) where M_(PDCCH) ^(total,slot,μ)=└N_(cells) ^(cap)·M_(PDCCH) ^(max,slot,μ)·(N_(cells,0) ^(DL,μ)+γ·N_(cells,1) ^(DL,μ))/Σ_(j=0) ³(N_(cells,0) ^(DL,j)+γ·N_(cells,1) ^(DL,j))┘+└b·Z┘; and, for each scheduled cell, UE is not required to monitor more than below BDs on the scheduling cell min(M_(PDCCH) ^(max,slot,μ),M_(PDCCH) ^(total,slot,μ)) if the scheduling cell belongs to set of downlink cells N_(cells,0) ^(DL,μ); min(γ·M_(PDCCH) ^(max,slot,μ),M_(PDCCH) ^(total,slot,μ)) if the scheduling cell belongs to set of downlink cells N_(cells,1) ^(DL,μ); and min(M_(PDCCH) ^(max,slot,μ),M_(PDCCH) ^(total,slot,μ)) for same CORESETPoolIndex value if the scheduling cell belongs to set of downlink cells N_(cells,1) ^(DL,μ).

a can be determined as a=1 when the scheduling cell is sSCell; a=−1 when the scheduling cell is primary cell; or, otherwise, a=0.

b can be determined as b=0 when sSCell and PCell have same SCS configuration; b=−N_(cells) ^(cap)·(N_(cells,0) ^(DL,μ) ^(PCell) +γ·N_(cells,1) ^(DL,μ) ^(PCell) )/Σ_(j=0) ³(N_(cells,0) ^(DL,j)+γ·N_(cells,1) ^(DL,j)) when sSCell and PCell have different SCS configuration, and μ=μ_(PCell); and b=N_(cells) ^(cap). (N_(cells,0) ^(DL,μ) ^(PCell) +γ·N_(cells,1) ^(DL,μ) ^(PCell) )/Σ_(j=0) ³(N_(cells,0) ^(DL,j)+γ·N_(cells,1) ^(DL,j)) when sSCell and PCell have different SCS configuration, and μ=μ_(sp)

Z can be determined using as a number of PDCCH BD candidates configured by higher layers (e.g., possible values can be e.g. 0≤Z≤2*M_(PDCCH) ^(max,slot,μ) ^(PCell) ) or Z=j·M_(PDCCH) ^(max,slot,μ) ^(PCell) and j is a scaling factor configured by RRC (e.g., possible values can be e.g. 0≤j≤2)

In some embodiments, a similar approach can also be used by the UE for determining the maximum number of non-overlapping CCEs used for PDCCH monitoring, e.g. by replacing M_(PDCCH) ^(max,slot,μ) with C_(PDCCH) ^(max,slot,μ), and M_(PDCCH) ^(total,slot,μ) with C_(PDCCH) ^(total,slot,μ).

Operations of a communication device will now be discussed with reference to the flow charts of FIGS. 12-14 according to some embodiments of inventive concepts. FIGS. 12-14 will be described below as being performed by communication device 900 (implemented using the structure of the block diagram of FIG. 9 ). For example, modules may be stored in memory 905 of FIG. 9 , and these modules may provide instructions so that when the instructions of a module are executed by respective processing circuitry 903, processing circuitry 903 performs respective operations of the flow chart.

At block 1210, processing circuitry 903 monitors PDCCH candidates on a PCell for PCell assignments.

At block 1220, processing circuitry 903 determines a maximum number of monitoring elements (e.g., blind decoding candidates or control channel elements). In some embodiments, determining the maximum number of monitoring elements includes responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for the PCell assignments, determining that the maximum number of monitoring elements is a first value; or responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for only SCell assignments, determining that the maximum number of monitoring elements is a second value, the first value being larger than the second value.

In additional or alternative embodiments, the maximum number of monitoring elements includes a second maximum number of monitoring elements. Monitoring the PDCCH candidates on the PCell for the PCell assignments includes monitoring the PDCCH candidates on the PCell for the PCell assignments based on a first maximum number of monitoring elements. Determining the maximum number of monitoring elements includes responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for the PCell assignments, determining that the first maximum number of monitoring elements is a third value; or responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for only SCell assignments, determining that the first maximum number of monitoring elements is a fourth value, the third value being larger than the fourth value by a transfer amount; and determining the first value or the second value based on the transfer amount, the first value being at least the transfer amount more than the second value.

In additional or alternative embodiments, determining the maximum number of monitoring elements includes determining that the communication device will monitor the PDCCH candidates on the SCell for the PCell assignments and determining the maximum number of monitoring elements based on one or more of: a higher layer configuration related to SCell to PCell scheduling; and a number of control resource set, coreset, pools configured for PDCCH monitoring.

In additional or alternative embodiments, determining the maximum number of monitoring elements includes receiving an indication from a network node of the communications network and determining the maximum number of monitoring elements based on the indication. The indication indicates at least one of: whether the higher layer configuration can be configured for the communication device; allowable values of the higher layer configuration that can be configured for the communication device; and applicable values for the coreset pools configured for PDCCH monitoring.

In additional or alternative embodiments, determining the maximum number of monitoring elements includes determining the maximum number of monitoring elements based on a PDCCH blind decoding capability supported by the communication device for carrier aggregation, CA.

In additional or alternative embodiments, determining the maximum number of monitoring elements includes determining a scaling factor based on a subcarrier spacing configuration, SCS, of the PCell and a SCS configuration of the SCell and determining the maximum number of monitoring elements based on the scaling factor.

At block 1230, processing circuitry 903 monitors the PDCCH candidates on the SCell based on the maximum number of monitoring elements.

FIG. 13 illustrates an example in which, at block 1330, processing circuitry 903 monitoring the PDCCH candidates on the SCell for the PCell assignments based on the maximum number of monitoring elements. At block 1340, processing circuitry 903 detects a PDCCH candidate on the SCell with a PCell assignment. At block 1350, processing circuitry 903 communicates, via transceiver 901, with the network node on the PCell according to the PCell assignment.

FIG. 14 illustrates an example in which, at block 1430, processing circuitry 903 monitoring the PDCCH candidates on the SCell for the SCell assignments based on the maximum number of monitoring elements. At block 1440, processing circuitry 903 detects a PDCCH candidate on the SCell with a SCell assignment. At block 1450, processing circuitry 903 communicates, via transceiver 901, with the network node on the SCell according to the SCell assignment.

In some embodiments, the maximum number of monitoring elements comprises a maximum number of blind decoding candidates or a maximum number of control channel elements. In additional or alternative embodiments, the PCell assignments comprise PCell physical downlink shared channel, PDSCH, and/or physical uplink shared channel, PUSCH, assignments. In additional or alternative embodiments, the SCell assignments comprise SCell PDSCH and/or PUSCH assignments.

Various operations of FIGS. 12-14 may be optional with respect to some embodiments of communication devices and related methods. For example, in regards to Embodiment 1, blocks 1330, 1340, and 1350 of FIG. 13 and blocks 1430, 1440, and 1450 of FIG. 14 may be optional.

Operations of a network node will now be discussed with reference to the flow chart of FIG. 15 according to some embodiments of inventive concepts. FIG. 15 will be described below as being performed by network node 1000 (implemented using the structure of the block diagram of FIG. 10 ). For example, modules may be stored in memory 1005 of FIG. 10 , and these modules may provide instructions so that when the instructions of a module are executed by respective processing circuitry 1003, processing circuitry 1003 performs respective operations of the flow chart.

At block 1510, processing circuitry 1003 determines whether the communication device is configured to monitor PDCCH candidates on a SCell for PCell assignments.

At block 1520, processing circuitry 1003 determines a set of PDCCH candidates on the SCell based on whether the communication device is configured to monitor the PDCCH candidates on the SCell for PCell assignments.

In some embodiments, determining the set of PDCCH candidates on the SCell includes determining a maximum number of monitoring elements that the communication device will use when monitoring the PDCCH candidates on the SCell and determining the set of PDCCH candidates on the SCell based on the maximum number of monitoring elements.

In additional or alternative embodiments, determining the maximum number of monitoring elements includes responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for the PCell assignments, determining that the maximum number of monitoring elements is a first value or responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for only SCell assignments, determining that the maximum number of monitoring elements is a second value, the first value being larger than the second value.

In additional or alternative embodiments, the maximum number of monitoring elements includes a second maximum number of monitoring elements. Determining the maximum number of monitoring elements includes: determining that the communication device is configured to monitor the PDCCH, candidates on a PCell for the PCell assignments based on a first maximum number of monitoring elements; responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for the PCell assignments; determining that the first maximum number of monitoring elements is a third value; or responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for only SCell assignments; determining that the first maximum number of monitoring elements is a fourth value, the third value being larger than the fourth value by a transfer amount; and determining the first value or the second value based on the transfer amount, the first value being at least the transfer amount more than the second value.

In additional or alternative embodiments, determining whether the communication device is configured to monitor PDCCH candidates on the SCell for the PCell assignments includes determining that the communication device will monitor the PDCCH candidates on the SCell for the PCell assignments. Determining the maximum number of monitoring elements includes determining the maximum number of monitoring elements based on one or more of: a higher layer configuration related to SCell to PCell scheduling; and a number of coreset pools configured for PDCCH monitoring.

In additional or alternative embodiments, determining the maximum number of monitoring elements includes transmitting an indication to the communication device and determining the maximum number of monitoring elements based on the indication. The indication indicates at least one of: whether the higher layer configuration can be configured for the communication device; allowable values of the higher layer configuration that can be configured for the communication device; and applicable values for the number of coreset pools configured for PDCCH monitoring.

In additional or alternative embodiments, determining the set of PDCCH candidates on the SCell includes determining the set of PDCCH candidates on the SCell based on a PDCCH blind decoding capability supported by the communication device for carrier aggregation, CA.

In additional or alternative embodiments, determining the set of PDCCH candidates on the SCell includes determining a scaling factor based on a subcarrier spacing configuration, SCS, of the PCell and a SCS configuration of the SCell; and determining the set of PDCCH candidates on the SCell based on the scaling factor.

At block 1530, processing circuitry 1003 transmits, via transceiver 1001, SCell assignments or the PCell assignments on the set of PDCCH candidates on the SCell.

In some embodiments, responsive to transmitting PCell assignments on the set of PDCCH candidates on the SCell, communicating with the communication device on the PCell according to the PCell assignment; or

In some embodiments, responsive to transmitting SCell assignments on the set of PDCCH candidates on the SCell, communicating with the communication device on the SCell according to the SCell assignment.

In some embodiments, the maximum number of monitoring elements comprises a maximum number of blind decoding candidates or a maximum number of control channel elements. In additional or alternative embodiments, the PCell assignments comprise PCell physical downlink shared channel, PDSCH, and/or physical uplink shared channel, PUSCH, assignments. In additional or alternative embodiments, the SCell assignments comprise SCell PDSCH and/or PUSCH assignments.

Various operations of FIG. 15 may be optional with respect to some embodiments of network nodes and related methods.

Example Embodiments are included below.

Embodiment 1. A method of operating a communication device in a communications network, the method comprising:

-   -   monitoring (1210) physical downlink control channel, PDCCH,         candidates on a primary cell, PCell, for PCell assignments;     -   determining (1220) a maximum number of monitoring elements based         on whether the communication device will monitor PDCCH         candidates on a secondary cell, SCell, for the PCell         assignments; and     -   responsive to determining the maximum number of monitoring         elements, monitoring (1230) the PDCCH candidates on the SCell         based on the maximum number of monitoring elements.

Embodiment 2. The method of Embodiment 1, wherein determining the maximum number of monitoring elements comprises:

-   -   responsive to determining that the communication device will         monitor the PDCCH candidates on the SCell for the PCell         assignments, determining that the maximum number of monitoring         elements is a first value; or     -   responsive to determining that the communication device will         monitor the PDCCH candidates on the SCell for only SCell         assignments, determining that the maximum number of monitoring         elements is a second value, the first value being larger than         the second value.

Embodiment 3. The method of Embodiment 2, wherein the maximum number of monitoring elements comprises a second maximum number of monitoring elements,

-   -   wherein monitoring the PDCCH candidates on the PCell for the         PCell assignments comprises monitoring the PDCCH candidates on         the PCell for the PCell assignments based on a first maximum         number of monitoring elements, and     -   wherein determining the maximum number of monitoring elements         comprises:         -   responsive to determining that the communication device will             monitor the PDCCH candidates on the SCell for the PCell             assignments; determining that the first maximum number of             monitoring elements is a third value; or         -   responsive to determining that the communication device will             monitor the PDCCH candidates on the SCell for only SCell             assignments; determining that the first maximum number of             monitoring elements is a fourth value, the third value being             larger than the fourth value by a transfer amount; and         -   determining the first value or the second value based on the             transfer amount, the first value being at least the transfer             amount more than the second value.

Embodiment 4. The method of any of Embodiments 1-3, wherein determining the maximum number of monitoring elements comprises:

-   -   determining that the communication device will monitor the PDCCH         candidates on the SCell for the PCell assignments; and     -   determining the maximum number of monitoring elements based on         one or more of:         -   a higher layer configuration related to SCell to PCell             scheduling; and         -   a number of control resource set, coreset, pools configured             for PDCCH monitoring.

Embodiment 5. The method of Embodiment 4, wherein determining the maximum number of monitoring elements comprises:

-   -   receiving an indication from a network node of the         communications network; and     -   determining the maximum number of monitoring elements based on         the indication, and     -   wherein the indication indicates at least one of:         -   whether the higher layer configuration can be configured for             the communication device;         -   allowable values of the higher layer configuration that can             be configured for the communication device; and         -   applicable values for the coreset pools configured for PDCCH             monitoring.

Embodiment 6. The method of any of Embodiments 1-5, wherein determining the maximum number of monitoring elements comprises determining the maximum number of monitoring elements based on a PDCCH blind decoding capability supported by the communication device for carrier aggregation, CA.

Embodiment 7. The method of any of Embodiments 1-6, wherein determining the maximum number of monitoring elements comprises:

-   -   determining a scaling factor based on a subcarrier spacing         configuration, SCS, of the PCell and a SCS configuration of the         SCell; and     -   determining the maximum number of monitoring elements based on         the scaling factor.

Embodiment 8. The method of any of Embodiments 1-7, wherein monitoring the PDCCH candidates on the SCell comprises monitoring (1330) the PDCCH candidates on the SCell for the PCell assignments based on the maximum number of monitoring elements,

-   -   the method further comprising:         -   detecting (1340) a PDCCH candidate on the SCell with a PCell             assignment; and         -   communicating (1350) with the network node on the PCell             according to the PCell assignment.

Embodiment 9. The method of any of Embodiments 1-8, wherein monitoring the PDCCH candidates on the SCell comprises monitoring (1430) the PDCCH candidates on the SCell for SCell assignments based on the maximum number of monitoring elements,

-   -   the method further comprising:         -   detecting (1440) a PDCCH candidate on the SCell with a SCell             assignment; and         -   communicating (1450) with the network node on the SCell             according to the SCell assignment.

Embodiment 10. The method of any of Embodiments 1-9, wherein the maximum number of monitoring elements comprises a maximum number of blind decoding candidates or a maximum number of control channel elements,

-   -   wherein the PCell assignments comprise PCell physical downlink         shared channel, PDSCH, and/or physical uplink shared channel,         PUSCH, assignments, and     -   wherein the SCell assignments comprise SCell PDSCH and/or PUSCH         assignments.

Embodiment 11. A method of operating a network node in a communications network, the method comprising:

-   -   determining (1510) whether a communication device in the         communications network is configured to monitor physical         downlink control channel, PDCCH, candidates on a secondary cell,         SCell, for primary cell, PCell, assignments;     -   determining (1520) a set of PDCCH candidates on the SCell based         on whether the communication device is configured to monitor the         PDCCH candidates on the SCell for PCell assignments; and     -   transmitting (1530) SCell assignments or the PCell assignments         on the set of PDCCH candidates on the SCell.

Embodiment 12. The method of Embodiment 11, wherein determining the set of PDCCH candidates on the SCell comprises:

-   -   determining a maximum number of monitoring elements that the         communication device will use when monitoring the PDCCH         candidates on the SCell; and     -   determining the set of PDCCH candidates on the SCell based on         the maximum number of monitoring elements.

Embodiment 13. The method of Embodiment 12, wherein determining the maximum number of monitoring elements comprises:

-   -   responsive to determining that the communication device will         monitor the PDCCH candidates on the SCell for the PCell         assignments, determining that the maximum number of monitoring         elements is a first value; or     -   responsive to determining that the communication device will         monitor the PDCCH candidates on the SCell for only SCell         assignments, determining that the maximum number of monitoring         elements is a second value, the first value being larger than         the second value.

Embodiment 14. The method of Embodiment 13, wherein the maximum number of monitoring elements comprises a second maximum number of monitoring elements, and

-   -   wherein determining the maximum number of monitoring elements         comprises:         -   determining that the communication device is configured to             monitor the PDCCH, candidates on a PCell for the PCell             assignments based on a first maximum number of monitoring             elements;         -   responsive to determining that the communication device will             monitor the PDCCH candidates on the SCell for the PCell             assignments; determining that the first maximum number of             monitoring elements is a third value; or         -   responsive to determining that the communication device will             monitor the PDCCH candidates on the SCell for only SCell             assignments; determining that the first maximum number of             monitoring elements is a fourth value, the third value being             larger than the fourth value by a transfer amount; and         -   determining the first value or the second value based on the             transfer amount, the first value being at least the transfer             amount more than the second value.

Embodiment 15. The method of any of Embodiments 12-14, wherein determining whether the communication device is configured to monitor PDCCH candidates on the SCell for the PCell assignments comprises determining that the communication device will monitor the PDCCH candidates on the SCell for the PCell assignments, and

-   -   wherein determining the maximum number of monitoring elements         comprises determining the maximum number of monitoring elements         based on one or more of:         -   a higher layer configuration related to SCell to PCell             scheduling; and         -   a number of coreset pools configured for PDCCH monitoring.

Embodiment 16. The method of Embodiment 15, wherein determining the maximum number of monitoring elements comprises:

-   -   transmitting an indication to the communication device; and     -   determining the maximum number of monitoring elements based on         the indication,     -   wherein the indication indicates at least one of:         -   whether the higher layer configuration can be configured for             the communication device;         -   allowable values of the higher layer configuration that can             be configured for the communication device; and         -   applicable values for the number of coreset pools configured             for PDCCH monitoring.

Embodiment 17. The method of any of Embodiments 11-16, wherein determining the set of PDCCH candidates on the SCell comprises determining the set of PDCCH candidates on the SCell based on a PDCCH blind decoding capability supported by the communication device for carrier aggregation, CA.

Embodiment 18. The method of any of Embodiments 11-17, wherein determining the set of PDCCH candidates on the SCell comprises:

-   -   determining a scaling factor based on a subcarrier spacing         configuration, SCS, of the PCell and a SCS configuration of the         SCell; and     -   determining the set of PDCCH candidates on the SCell based on         the scaling factor.

Embodiment 19. The method of any of Embodiments 11-18, further comprising:

-   -   responsive to transmitting PCell assignments on the set of PDCCH         candidates on the SCell, communicating with the communication         device on the PCell according to the PCell assignment; or     -   responsive to transmitting SCell assignments on the set of PDCCH         candidates on the SCell, communicating with the communication         device on the SCell according to the SCell assignment.

Embodiment 20. The method of any of Embodiments 11-19, wherein the maximum number of monitoring elements comprises a maximum number of blind decoding candidates or a maximum number of control channel elements,

-   -   wherein the PCell assignments comprise PCell physical downlink         shared channel, PDSCH, and/or physical uplink shared channel,         PUSCH, assignments, and     -   wherein the SCell assignments comprise SCell PDSCH and/or PUSCH         assignments

Embodiment 21. A communication device (900) configured to operate in a communications network, the communication device comprising:

-   -   processing circuitry (903); and     -   memory (905) coupled to the processing circuitry and having         instructions stored therein that are executable by the         processing circuitry to cause the communication device to         perform operations comprising:         -   monitoring (1210) physical downlink control channel, PDCCH,             candidates on a primary cell, PCell, for PCell assignments;         -   determining (1220) a maximum number of monitoring elements             based on whether the communication device will monitor PDCCH             candidates on a secondary cell, SCell, for the PCell             assignments; and         -   responsive to determining the maximum number of monitoring             elements, monitoring (1230) the PDCCH candidates on the             SCell based on the maximum number of monitoring elements.

Embodiment 22. The communication device of Embodiment 21, the operations further comprising any of the operations of Embodiments 2-10.

Embodiment 23. A network node (1000) configured to operate in a communications, the network node comprising:

-   -   processing circuitry (1003); and     -   memory (1005) coupled to the processing circuitry and having         instructions stored therein that are executable by the         processing circuitry to cause the network node to perform         operations comprising:         -   determining (1510) whether a communication device in the             communications network is configured to monitor physical             downlink control channel, PDCCH, candidates on a secondary             cell, SCell, for primary cell, PCell, assignments;         -   determining (1520) a set of PDCCH candidates on the SCell             based on whether the communication device is configured to             monitor the PDCCH candidates on the SCell for PCell             assignments; and         -   transmitting (1530) SCell assignments or the PCell             assignments on the set of PDCCH candidates on the SCell.

Embodiment 24. The network node of Embodiment 23, the operations further comprising any of the operations of Embodiments 12-20.

Embodiment 25. A communication device (900) configured to operate in a communications network, the communication device adapted to perform operations comprising:

-   -   monitoring (1210) physical downlink control channel, PDCCH,         candidates on a primary cell, PCell, for PCell assignments;     -   determining (1220) a maximum number of monitoring elements based         on whether the communication device will monitor PDCCH         candidates on a secondary cell, SCell, for the PCell         assignments; and     -   responsive to determining the maximum number of monitoring         elements, monitoring (1230) the PDCCH candidates on the SCell         based on the maximum number of monitoring elements.

Embodiment 26. The communication device of Embodiment 25, further adapted to perform any of the operations of Embodiments 2-10.

Embodiment 27. A network node (1000) configured to operate in a communications network, the network node adapted to perform operations comprising:

-   -   determining (1510) whether a communication device in the         communications network is configured to monitor physical         downlink control channel, PDCCH, candidates on a secondary cell,         SCell, for primary cell, PCell, assignments;     -   determining (1520) a set of PDCCH candidates on the SCell based         on whether the communication device is configured to monitor the         PDCCH candidates on the SCell for PCell assignments; and     -   transmitting (1530) SCell assignments or the PCell assignments         on the set of PDCCH candidates on the SCell.

Embodiment 28. The network node of Embodiment 27, further adapted to perform any of the operations of Embodiments 12-20.

Embodiment 29. A computer program comprising program code to be executed by processing circuitry (903) of a communication device (900) configured to operate in a communications network, whereby execution of the program code causes the communication device to perform operations comprising:

-   -   monitoring (1210) physical downlink control channel, PDCCH,         candidates on a primary cell, PCell, for PCell assignments;         -   determining (1220) a maximum number of monitoring elements             based on whether the communication device will monitor PDCCH             candidates on a secondary cell, SCell, for the PCell             assignments; and         -   responsive to determining the maximum number of monitoring             elements, monitoring (1230) the PDCCH candidates on the             SCell based on the maximum number of monitoring elements.

Embodiment 30. The computer program code of Embodiment 29, the operations further comprising any of the operations of Embodiments 2-10.

Embodiment 31. A computer program comprising program code to be executed by processing circuitry (1003) of a network node (1000) configured to operate in a communications network, whereby execution of the program code causes the network node to perform operations comprising:

-   -   determining (1510) whether a communication device in the         communications network is configured to monitor physical         downlink control channel, PDCCH, candidates on a secondary cell,         SCell, for primary cell, PCell, assignments;     -   determining (1520) a set of PDCCH candidates on the SCell based         on whether the communication device is configured to monitor the         PDCCH candidates on the SCell for PCell assignments; and     -   transmitting (1530) SCell assignments or the PCell assignments         on the set of PDCCH candidates on the SCell.

Embodiment 32. The computer program of Embodiment 31, the operations further comprising any of the operations of Embodiments 12-20.

Embodiment 33. A computer program product comprising a non-transitory storage medium including program code to be executed by processing circuitry (903) of a communication device (900) configured to operate in a communications network, whereby execution of the program code causes the communication device to perform operations comprising:

-   -   monitoring (1210) physical downlink control channel, PDCCH,         candidates on a primary cell, PCell, for PCell assignments;     -   determining (1220) a maximum number of monitoring elements based         on whether the communication device will monitor PDCCH         candidates on a secondary cell, SCell, for the PCell         assignments; and     -   responsive to determining the maximum number of monitoring         elements, monitoring (1230) the PDCCH candidates on the SCell         based on the maximum number of monitoring elements.

Embodiment 34. The computer program product of Embodiment 33, the operations further comprising any of the operations of Embodiments 2-10.

Embodiment 35. A computer program product comprising a non-transitory storage medium including program code to be executed by processing circuitry (1003) of a network node (1000) configured to operate in a communications network, whereby execution of the program code causes the network node to perform operations comprising:

-   -   determining (1510) whether a communication device in the         communications network is configured to monitor physical         downlink control channel, PDCCH, candidates on a secondary cell,         SCell, for primary cell, PCell, assignments;     -   determining (1520) a set of PDCCH candidates on the SCell based         on whether the communication device is configured to monitor the         PDCCH candidates on the SCell for PCell assignments; and     -   transmitting (1530) SCell assignments or the PCell assignments         on the set of PDCCH candidates on the SCell.

Embodiment 36. The computer program product of Embodiment 35, the operations further comprising any of the operations of Embodiments 12-20.

Some abbreviations used above are described below.

Abbreviation Explanation ACK Acknowledgment ACK/NACK Acknowledgment/Not-acknowledgment BWP Bandwidth Part CBG Code Block Group DAI Downlink Assignment Indicator DCI Downlink Control Information HARQ Hybrid Automatic Repeat Request MIMO Multiple Input Multiple Output NACK Not-acknowledgment PDCCH Physical Downlink Control Channel PDSCH Physical Shared Data Channel PMO PDCCH Monitoring Occasion PUCCH Physical Uplink Control Channel TB Transport Block UCI Uplink Control Information TRP Transmission/reception point m-TRP multi-TRP

Additional explanation is provided below.

Generally, all terms used herein are to be interpreted according to their ordinary meaning in the relevant technical field, unless a different meaning is clearly given and/or is implied from the context in which it is used. All references to a/an/the element, apparatus, component, means, step, etc. are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, step, etc., unless explicitly stated otherwise. The steps of any methods disclosed herein do not have to be performed in the exact order disclosed, unless a step is explicitly described as following or preceding another step and/or where it is implicit that a step must follow or precede another step. Any feature of any of the embodiments disclosed herein may be applied to any other embodiment, wherever appropriate. Likewise, any advantage of any of the embodiments may apply to any other embodiments, and vice versa. Other objectives, features and advantages of the enclosed embodiments will be apparent from the following description.

Some of the embodiments contemplated herein will now be described more fully with reference to the accompanying drawings. Other embodiments, however, are contained within the scope of the subject matter disclosed herein, the disclosed subject matter should not be construed as limited to only the embodiments set forth herein; rather, these embodiments are provided by way of example to convey the scope of the subject matter to those skilled in the art.

FIG. 16 illustrates a wireless network in accordance with some embodiments.

Although the subject matter described herein may be implemented in any appropriate type of system using any suitable components, the embodiments disclosed herein are described in relation to a wireless network, such as the example wireless network illustrated in FIG. 16 . For simplicity, the wireless network of FIG. 16 only depicts network 4106, network nodes 4160 and 4160 b, and WDs 4110, 4110 b, and 4110 c (also referred to as mobile terminals). In practice, a wireless network may further include any additional elements suitable to support communication between wireless devices or between a wireless device and another communication device, such as a landline telephone, a service provider, or any other network node or end device. Of the illustrated components, network node 4160 and wireless device (WD) 4110 are depicted with additional detail. The wireless network may provide communication and other types of services to one or more wireless devices to facilitate the wireless devices' access to and/or use of the services provided by, or via, the wireless network.

The wireless network may comprise and/or interface with any type of communication, telecommunication, data, cellular, and/or radio network or other similar type of system. In some embodiments, the wireless network may be configured to operate according to specific standards or other types of predefined rules or procedures. Thus, particular embodiments of the wireless network may implement communication standards, such as Global System for Mobile Communications (GSM), Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), and/or other suitable 2G, 3G, 4G, or 5G standards; wireless local area network (WLAN) standards, such as the IEEE 802.11 standards; and/or any other appropriate wireless communication standard, such as the Worldwide Interoperability for Microwave Access (WiMax), Bluetooth, Z-Wave and/or ZigBee standards.

Network 4106 may comprise one or more backhaul networks, core networks, IP networks, public switched telephone networks (PSTNs), packet data networks, optical networks, wide-area networks (WANs), local area networks (LANs), wireless local area networks (WLANs), wired networks, wireless networks, metropolitan area networks, and other networks to enable communication between devices.

Network node 4160 and WD 4110 comprise various components described in more detail below. These components work together in order to provide network node and/or wireless device functionality, such as providing wireless connections in a wireless network. In different embodiments, the wireless network may comprise any number of wired or wireless networks, network nodes, base stations, controllers, wireless devices, relay stations, and/or any other components or systems that may facilitate or participate in the communication of data and/or signals whether via wired or wireless connections.

As used herein, network node refers to equipment capable, configured, arranged and/or operable to communicate directly or indirectly with a wireless device and/or with other network nodes or equipment in the wireless network to enable and/or provide wireless access to the wireless device and/or to perform other functions (e.g., administration) in the wireless network. Examples of network nodes include, but are not limited to, access points (APs) (e.g., radio access points), base stations (BSs) (e.g., radio base stations, Node Bs, evolved Node Bs (eNBs) and NR NodeBs (gNBs)). Base stations may be categorized based on the amount of coverage they provide (or, stated differently, their transmit power level) and may then also be referred to as femto base stations, pico base stations, micro base stations, or macro base stations. A base station may be a relay node or a relay donor node controlling a relay. A network node may also include one or more (or all) parts of a distributed radio base station such as centralized digital units and/or remote radio units (RRUs), sometimes referred to as Remote Radio Heads (RRHs). Such remote radio units may or may not be integrated with an antenna as an antenna integrated radio. Parts of a distributed radio base station may also be referred to as nodes in a distributed antenna system (DAS). Yet further examples of network nodes include multi-standard radio (MSR) equipment such as MSR BSs, network controllers such as radio network controllers (RNCs) or base station controllers (BSCs), base transceiver stations (BTSs), transmission points, transmission nodes, multi-cell/multicast coordination entities (MCEs), core network nodes (e.g., MSCs, MMEs), O&M nodes, OSS nodes, SON nodes, positioning nodes (e.g., E-SMLCs), and/or MDTs. As another example, a network node may be a virtual network node as described in more detail below. More generally, however, network nodes may represent any suitable device (or group of devices) capable, configured, arranged, and/or operable to enable and/or provide a wireless device with access to the wireless network or to provide some service to a wireless device that has accessed the wireless network.

In FIG. 16 , network node 4160 includes processing circuitry 4170, device readable medium 4180, interface 4190, auxiliary equipment 4184, power source 4186, power circuitry 4187, and antenna 4162. Although network node 4160 illustrated in the example wireless network of FIG. 16 may represent a device that includes the illustrated combination of hardware components, other embodiments may comprise network nodes with different combinations of components. It is to be understood that a network node comprises any suitable combination of hardware and/or software needed to perform the tasks, features, functions and methods disclosed herein. Moreover, while the components of network node 4160 are depicted as single boxes located within a larger box, or nested within multiple boxes, in practice, a network node may comprise multiple different physical components that make up a single illustrated component (e.g., device readable medium 4180 may comprise multiple separate hard drives as well as multiple RAM modules).

Similarly, network node 4160 may be composed of multiple physically separate components (e.g., a NodeB component and a RNC component, or a BTS component and a BSC component, etc.), which may each have their own respective components. In certain scenarios in which network node 4160 comprises multiple separate components (e.g., BTS and BSC components), one or more of the separate components may be shared among several network nodes. For example, a single RNC may control multiple NodeB's. In such a scenario, each unique NodeB and RNC pair, may in some instances be considered a single separate network node. In some embodiments, network node 4160 may be configured to support multiple radio access technologies (RATs). In such embodiments, some components may be duplicated (e.g., separate device readable medium 4180 for the different RATs) and some components may be reused (e.g., the same antenna 4162 may be shared by the RATs). Network node 4160 may also include multiple sets of the various illustrated components for different wireless technologies integrated into network node 4160, such as, for example, GSM, WCDMA, LTE, NR, WiFi, or Bluetooth wireless technologies. These wireless technologies may be integrated into the same or different chip or set of chips and other components within network node 4160.

Processing circuitry 4170 is configured to perform any determining, calculating, or similar operations (e.g., certain obtaining operations) described herein as being provided by a network node. These operations performed by processing circuitry 4170 may include processing information obtained by processing circuitry 4170 by, for example, converting the obtained information into other information, comparing the obtained information or converted information to information stored in the network node, and/or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination.

Processing circuitry 4170 may comprise a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application-specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software and/or encoded logic operable to provide, either alone or in conjunction with other network node 4160 components, such as device readable medium 4180, network node 4160 functionality. For example, processing circuitry 4170 may execute instructions stored in device readable medium 4180 or in memory within processing circuitry 4170. Such functionality may include providing any of the various wireless features, functions, or benefits discussed herein. In some embodiments, processing circuitry 4170 may include a system on a chip (SOC).

In some embodiments, processing circuitry 4170 may include one or more of radio frequency (RF) transceiver circuitry 4172 and baseband processing circuitry 4174. In some embodiments, radio frequency (RF) transceiver circuitry 4172 and baseband processing circuitry 4174 may be on separate chips (or sets of chips), boards, or units, such as radio units and digital units. In alternative embodiments, part or all of RF transceiver circuitry 4172 and baseband processing circuitry 4174 may be on the same chip or set of chips, boards, or units

In certain embodiments, some or all of the functionality described herein as being provided by a network node, base station, eNB or other such network device may be performed by processing circuitry 4170 executing instructions stored on device readable medium 4180 or memory within processing circuitry 4170. In alternative embodiments, some or all of the functionality may be provided by processing circuitry 4170 without executing instructions stored on a separate or discrete device readable medium, such as in a hard-wired manner. In any of those embodiments, whether executing instructions stored on a device readable storage medium or not, processing circuitry 4170 can be configured to perform the described functionality. The benefits provided by such functionality are not limited to processing circuitry 4170 alone or to other components of network node 4160, but are enjoyed by network node 4160 as a whole, and/or by end users and the wireless network generally.

Device readable medium 4180 may comprise any form of volatile or non-volatile computer readable memory including, without limitation, persistent storage, solid-state memory, remotely mounted memory, magnetic media, optical media, random access memory (RAM), read-only memory (ROM), mass storage media (for example, a hard disk), removable storage media (for example, a flash drive, a Compact Disk (CD) or a Digital Video Disk (DVD)), and/or any other volatile or non-volatile, non-transitory device readable and/or computer-executable memory devices that store information, data, and/or instructions that may be used by processing circuitry 4170. Device readable medium 4180 may store any suitable instructions, data or information, including a computer program, software, an application including one or more of logic, rules, code, tables, etc. and/or other instructions capable of being executed by processing circuitry 4170 and, utilized by network node 4160. Device readable medium 4180 may be used to store any calculations made by processing circuitry 4170 and/or any data received via interface 4190. In some embodiments, processing circuitry 4170 and device readable medium 4180 may be considered to be integrated.

Interface 4190 is used in the wired or wireless communication of signalling and/or data between network node 4160, network 4106, and/or WDs 4110. As illustrated, interface 4190 comprises port(s)/terminal(s) 4194 to send and receive data, for example to and from network 4106 over a wired connection. Interface 4190 also includes radio front end circuitry 4192 that may be coupled to, or in certain embodiments a part of, antenna 4162. Radio front end circuitry 4192 comprises filters 4198 and amplifiers 4196. Radio front end circuitry 4192 may be connected to antenna 4162 and processing circuitry 4170. Radio front end circuitry may be configured to condition signals communicated between antenna 4162 and processing circuitry 4170. Radio front end circuitry 4192 may receive digital data that is to be sent out to other network nodes or WDs via a wireless connection. Radio front end circuitry 4192 may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters using a combination of filters 4198 and/or amplifiers 4196. The radio signal may then be transmitted via antenna 4162. Similarly, when receiving data, antenna 4162 may collect radio signals which are then converted into digital data by radio front end circuitry 4192. The digital data may be passed to processing circuitry 4170. In other embodiments, the interface may comprise different components and/or different combinations of components.

In certain alternative embodiments, network node 4160 may not include separate radio front end circuitry 4192, instead, processing circuitry 4170 may comprise radio front end circuitry and may be connected to antenna 4162 without separate radio front end circuitry 4192. Similarly, in some embodiments, all or some of RF transceiver circuitry 4172 may be considered a part of interface 4190. In still other embodiments, interface 4190 may include one or more ports or terminals 4194, radio front end circuitry 4192, and RF transceiver circuitry 4172, as part of a radio unit (not shown), and interface 4190 may communicate with baseband processing circuitry 4174, which is part of a digital unit (not shown).

Antenna 4162 may include one or more antennas, or antenna arrays, configured to send and/or receive wireless signals. Antenna 4162 may be coupled to radio front end circuitry 4192 and may be any type of antenna capable of transmitting and receiving data and/or signals wirelessly. In some embodiments, antenna 4162 may comprise one or more omni-directional, sector or panel antennas operable to transmit/receive radio signals between, for example, 2 GHz and 66 GHz. An omni-directional antenna may be used to transmit/receive radio signals in any direction, a sector antenna may be used to transmit/receive radio signals from devices within a particular area, and a panel antenna may be a line of sight antenna used to transmit/receive radio signals in a relatively straight line. In some instances, the use of more than one antenna may be referred to as MIMO. In certain embodiments, antenna 4162 may be separate from network node 4160 and may be connectable to network node 4160 through an interface or port.

Antenna 4162, interface 4190, and/or processing circuitry 4170 may be configured to perform any receiving operations and/or certain obtaining operations described herein as being performed by a network node. Any information, data and/or signals may be received from a wireless device, another network node and/or any other network equipment. Similarly, antenna 4162, interface 4190, and/or processing circuitry 4170 may be configured to perform any transmitting operations described herein as being performed by a network node. Any information, data and/or signals may be transmitted to a wireless device, another network node and/or any other network equipment.

Power circuitry 4187 may comprise, or be coupled to, power management circuitry and is configured to supply the components of network node 4160 with power for performing the functionality described herein. Power circuitry 4187 may receive power from power source 4186. Power source 4186 and/or power circuitry 4187 may be configured to provide power to the various components of network node 4160 in a form suitable for the respective components (e.g., at a voltage and current level needed for each respective component). Power source 4186 may either be included in, or external to, power circuitry 4187 and/or network node 4160. For example, network node 4160 may be connectable to an external power source (e.g., an electricity outlet) via an input circuitry or interface such as an electrical cable, whereby the external power source supplies power to power circuitry 4187. As a further example, power source 4186 may comprise a source of power in the form of a battery or battery pack which is connected to, or integrated in, power circuitry 4187. The battery may provide backup power should the external power source fail. Other types of power sources, such as photovoltaic devices, may also be used.

Alternative embodiments of network node 4160 may include additional components beyond those shown in FIG. 16 that may be responsible for providing certain aspects of the network node's functionality, including any of the functionality described herein and/or any functionality necessary to support the subject matter described herein. For example, network node 4160 may include user interface equipment to allow input of information into network node 4160 and to allow output of information from network node 4160. This may allow a user to perform diagnostic, maintenance, repair, and other administrative functions for network node 4160.

As used herein, wireless device (WD) refers to a device capable, configured, arranged and/or operable to communicate wirelessly with network nodes and/or other wireless devices. Unless otherwise noted, the term WD may be used interchangeably herein with user equipment (UE). Communicating wirelessly may involve transmitting and/or receiving wireless signals using electromagnetic waves, radio waves, infrared waves, and/or other types of signals suitable for conveying information through air. In some embodiments, a WD may be configured to transmit and/or receive information without direct human interaction. For instance, a WD may be designed to transmit information to a network on a predetermined schedule, when triggered by an internal or external event, or in response to requests from the network. Examples of a WD include, but are not limited to, a smart phone, a mobile phone, a cell phone, a voice over IP (VoIP) phone, a wireless local loop phone, a desktop computer, a personal digital assistant (PDA), a wireless cameras, a gaming console or device, a music storage device, a playback appliance, a wearable terminal device, a wireless endpoint, a mobile station, a tablet, a laptop, a laptop-embedded equipment (LEE), a laptop-mounted equipment (LME), a smart device, a wireless customer-premise equipment (CPE). a vehicle-mounted wireless terminal device, etc. A WD may support device-to-device (D2D) communication, for example by implementing a 3GPP standard for sidelink communication, vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-everything (V2X) and may in this case be referred to as a D2D communication device. As yet another specific example, in an Internet of Things (IoT) scenario, a WD may represent a machine or other device that performs monitoring and/or measurements, and transmits the results of such monitoring and/or measurements to another WD and/or a network node. The WD may in this case be a machine-to-machine (M2M) device, which may in a 3GPP context be referred to as an MTC device. As one particular example, the WD may be a UE implementing the 3GPP narrow band internet of things (NB-IoT) standard. Particular examples of such machines or devices are sensors, metering devices such as power meters, industrial machinery, or home or personal appliances (e.g. refrigerators, televisions, etc.) personal wearables (e.g., watches, fitness trackers, etc.). In other scenarios, a WD may represent a vehicle or other equipment that is capable of monitoring and/or reporting on its operational status or other functions associated with its operation. A WD as described above may represent the endpoint of a wireless connection, in which case the device may be referred to as a wireless terminal. Furthermore, a WD as described above may be mobile, in which case it may also be referred to as a mobile device or a mobile terminal.

As illustrated, wireless device 4110 includes antenna 4111, interface 4114, processing circuitry 4120, device readable medium 4130, user interface equipment 4132, auxiliary equipment 4134, power source 4136 and power circuitry 4137. WD 4110 may include multiple sets of one or more of the illustrated components for different wireless technologies supported by WD 4110, such as, for example, GSM, WCDMA, LTE, NR, WiFi, WiMAX, or Bluetooth wireless technologies, just to mention a few. These wireless technologies may be integrated into the same or different chips or set of chips as other components within WD 4110.

Antenna 4111 may include one or more antennas or antenna arrays, configured to send and/or receive wireless signals, and is connected to interface 4114. In certain alternative embodiments, antenna 4111 may be separate from WD 4110 and be connectable to WD 4110 through an interface or port. Antenna 4111, interface 4114, and/or processing circuitry 4120 may be configured to perform any receiving or transmitting operations described herein as being performed by a WD. Any information, data and/or signals may be received from a network node and/or another WD. In some embodiments, radio front end circuitry and/or antenna 4111 may be considered an interface.

As illustrated, interface 4114 comprises radio front end circuitry 4112 and antenna 4111. Radio front end circuitry 4112 comprise one or more filters 4118 and amplifiers 4116. Radio front end circuitry 4112 is connected to antenna 4111 and processing circuitry 4120, and is configured to condition signals communicated between antenna 4111 and processing circuitry 4120. Radio front end circuitry 4112 may be coupled to or a part of antenna 4111. In some embodiments, WD 4110 may not include separate radio front end circuitry 4112; rather, processing circuitry 4120 may comprise radio front end circuitry and may be connected to antenna 4111. Similarly, in some embodiments, some or all of RF transceiver circuitry 4122 may be considered a part of interface 4114. Radio front end circuitry 4112 may receive digital data that is to be sent out to other network nodes or WDs via a wireless connection. Radio front end circuitry 4112 may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters using a combination of filters 4118 and/or amplifiers 4116. The radio signal may then be transmitted via antenna 4111. Similarly, when receiving data, antenna 4111 may collect radio signals which are then converted into digital data by radio front end circuitry 4112. The digital data may be passed to processing circuitry 4120. In other embodiments, the interface may comprise different components and/or different combinations of components.

Processing circuitry 4120 may comprise a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application-specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software, and/or encoded logic operable to provide, either alone or in conjunction with other WD 4110 components, such as device readable medium 4130, WD 4110 functionality. Such functionality may include providing any of the various wireless features or benefits discussed herein. For example, processing circuitry 4120 may execute instructions stored in device readable medium 4130 or in memory within processing circuitry 4120 to provide the functionality disclosed herein.

As illustrated, processing circuitry 4120 includes one or more of RF transceiver circuitry 4122, baseband processing circuitry 4124, and application processing circuitry 4126. In other embodiments, the processing circuitry may comprise different components and/or different combinations of components. In certain embodiments processing circuitry 4120 of WD 4110 may comprise a SOC. In some embodiments, RF transceiver circuitry 4122, baseband processing circuitry 4124, and application processing circuitry 4126 may be on separate chips or sets of chips. In alternative embodiments, part or all of baseband processing circuitry 4124 and application processing circuitry 4126 may be combined into one chip or set of chips, and RF transceiver circuitry 4122 may be on a separate chip or set of chips. In still alternative embodiments, part or all of RF transceiver circuitry 4122 and baseband processing circuitry 4124 may be on the same chip or set of chips, and application processing circuitry 4126 may be on a separate chip or set of chips. In yet other alternative embodiments, part or all of RF transceiver circuitry 4122, baseband processing circuitry 4124, and application processing circuitry 4126 may be combined in the same chip or set of chips. In some embodiments, RF transceiver circuitry 4122 may be a part of interface 4114. RF transceiver circuitry 4122 may condition RF signals for processing circuitry 4120.

In certain embodiments, some or all of the functionality described herein as being performed by a WD may be provided by processing circuitry 4120 executing instructions stored on device readable medium 4130, which in certain embodiments may be a computer-readable storage medium. In alternative embodiments, some or all of the functionality may be provided by processing circuitry 4120 without executing instructions stored on a separate or discrete device readable storage medium, such as in a hard-wired manner. In any of those particular embodiments, whether executing instructions stored on a device readable storage medium or not, processing circuitry 4120 can be configured to perform the described functionality. The benefits provided by such functionality are not limited to processing circuitry 4120 alone or to other components of WD 4110, but are enjoyed by WD 4110 as a whole, and/or by end users and the wireless network generally.

Processing circuitry 4120 may be configured to perform any determining, calculating, or similar operations (e.g., certain obtaining operations) described herein as being performed by a WD. These operations, as performed by processing circuitry 4120, may include processing information obtained by processing circuitry 4120 by, for example, converting the obtained information into other information, comparing the obtained information or converted information to information stored by WD 4110, and/or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination.

Device readable medium 4130 may be operable to store a computer program, software, an application including one or more of logic, rules, code, tables, etc. and/or other instructions capable of being executed by processing circuitry 4120. Device readable medium 4130 may include computer memory (e.g., Random Access Memory (RAM) or Read Only Memory (ROM)), mass storage media (e.g., a hard disk), removable storage media (e.g., a Compact Disk (CD) or a Digital Video Disk (DVD)), and/or any other volatile or non-volatile, non-transitory device readable and/or computer executable memory devices that store information, data, and/or instructions that may be used by processing circuitry 4120. In some embodiments, processing circuitry 4120 and device readable medium 4130 may be considered to be integrated.

User interface equipment 4132 may provide components that allow for a human user to interact with WD 4110. Such interaction may be of many forms, such as visual, audial, tactile, etc. User interface equipment 4132 may be operable to produce output to the user and to allow the user to provide input to WD 4110. The type of interaction may vary depending on the type of user interface equipment 4132 installed in WD 4110. For example, if WD 4110 is a smart phone, the interaction may be via a touch screen; if WD 4110 is a smart meter, the interaction may be through a screen that provides usage (e.g., the number of gallons used) or a speaker that provides an audible alert (e.g., if smoke is detected). User interface equipment 4132 may include input interfaces, devices and circuits, and output interfaces, devices and circuits. User interface equipment 4132 is configured to allow input of information into WD 4110, and is connected to processing circuitry 4120 to allow processing circuitry 4120 to process the input information. User interface equipment 4132 may include, for example, a microphone, a proximity or other sensor, keys/buttons, a touch display, one or more cameras, a USB port, or other input circuitry. User interface equipment 4132 is also configured to allow output of information from WD 4110, and to allow processing circuitry 4120 to output information from WD 4110. User interface equipment 4132 may include, for example, a speaker, a display, vibrating circuitry, a USB port, a headphone interface, or other output circuitry. Using one or more input and output interfaces, devices, and circuits, of user interface equipment 4132, WD 4110 may communicate with end users and/or the wireless network, and allow them to benefit from the functionality described herein.

Auxiliary equipment 4134 is operable to provide more specific functionality which may not be generally performed by WDs. This may comprise specialized sensors for doing measurements for various purposes, interfaces for additional types of communication such as wired communications etc. The inclusion and type of components of auxiliary equipment 4134 may vary depending on the embodiment and/or scenario.

Power source 4136 may, in some embodiments, be in the form of a battery or battery pack. Other types of power sources, such as an external power source (e.g., an electricity outlet), photovoltaic devices or power cells, may also be used. WD 4110 may further comprise power circuitry 4137 for delivering power from power source 4136 to the various parts of WD 4110 which need power from power source 4136 to carry out any functionality described or indicated herein. Power circuitry 4137 may in certain embodiments comprise power management circuitry. Power circuitry 4137 may additionally or alternatively be operable to receive power from an external power source; in which case WD 4110 may be connectable to the external power source (such as an electricity outlet) via input circuitry or an interface such as an electrical power cable. Power circuitry 4137 may also in certain embodiments be operable to deliver power from an external power source to power source 4136. This may be, for example, for the charging of power source 4136. Power circuitry 4137 may perform any formatting, converting, or other modification to the power from power source 4136 to make the power suitable for the respective components of WD 4110 to which power is supplied.

FIG. 17 illustrates a user Equipment in accordance with some embodiments.

FIG. 17 illustrates one embodiment of a UE in accordance with various aspects described herein. As used herein, a user equipment or UE may not necessarily have a user in the sense of a human user who owns and/or operates the relevant device. Instead, a UE may represent a device that is intended for sale to, or operation by, a human user but which may not, or which may not initially, be associated with a specific human user (e.g., a smart sprinkler controller). Alternatively, a UE may represent a device that is not intended for sale to, or operation by, an end user but which may be associated with or operated for the benefit of a user (e.g., a smart power meter). UE 4200 may be any UE identified by the 3rd Generation Partnership Project (3GPP), including a NB-IoT UE, a machine type communication (MTC) UE, and/or an enhanced MTC (eMTC) UE. UE 4200, as illustrated in FIG. 17 , is one example of a WD configured for communication in accordance with one or more communication standards promulgated by the 3rd Generation Partnership Project (3GPP), such as 3GPP's GSM, UMTS, LTE, and/or 5G standards. As mentioned previously, the term WD and UE may be used interchangeable. Accordingly, although FIG. 17 is a UE, the components discussed herein are equally applicable to a WD, and vice-versa.

In FIG. 17 , UE 4200 includes processing circuitry 4201 that is operatively coupled to input/output interface 4205, radio frequency (RF) interface 4209, network connection interface 4211, memory 4215 including random access memory (RAM) 4217, read-only memory (ROM) 4219, and storage medium 4221 or the like, communication subsystem 4231, power source 4213, and/or any other component, or any combination thereof. Storage medium 4221 includes operating system 4223, application program 4225, and data 4227. In other embodiments, storage medium 4221 may include other similar types of information. Certain UEs may utilize all of the components shown in FIG. 17 , or only a subset of the components. The level of integration between the components may vary from one UE to another UE. Further, certain UEs may contain multiple instances of a component, such as multiple processors, memories, transceivers, transmitters, receivers, etc.

In FIG. 17 , processing circuitry 4201 may be configured to process computer instructions and data. Processing circuitry 4201 may be configured to implement any sequential state machine operative to execute machine instructions stored as machine-readable computer programs in the memory, such as one or more hardware-implemented state machines (e.g., in discrete logic, FPGA, ASIC, etc.); programmable logic together with appropriate firmware; one or more stored program, general-purpose processors, such as a microprocessor or Digital Signal Processor (DSP), together with appropriate software; or any combination of the above. For example, the processing circuitry 4201 may include two central processing units (CPUs). Data may be information in a form suitable for use by a computer.

In the depicted embodiment, input/output interface 4205 may be configured to provide a communication interface to an input device, output device, or input and output device. UE 4200 may be configured to use an output device via input/output interface 4205. An output device may use the same type of interface port as an input device. For example, a USB port may be used to provide input to and output from UE 4200. The output device may be a speaker, a sound card, a video card, a display, a monitor, a printer, an actuator, an emitter, a smartcard, another output device, or any combination thereof. UE 4200 may be configured to use an input device via input/output interface 4205 to allow a user to capture information into UE 4200. The input device may include a touch-sensitive or presence-sensitive display, a camera (e.g., a digital camera, a digital video camera, a web camera, etc.), a microphone, a sensor, a mouse, a trackball, a directional pad, a trackpad, a scroll wheel, a smartcard, and the like. The presence-sensitive display may include a capacitive or resistive touch sensor to sense input from a user. A sensor may be, for instance, an accelerometer, a gyroscope, a tilt sensor, a force sensor, a magnetometer, an optical sensor, a proximity sensor, another like sensor, or any combination thereof. For example, the input device may be an accelerometer, a magnetometer, a digital camera, a microphone, and an optical sensor.

In FIG. 17 , RF interface 4209 may be configured to provide a communication interface to RF components such as a transmitter, a receiver, and an antenna. Network connection interface 4211 may be configured to provide a communication interface to network 4243 a. Network 4243 a may encompass wired and/or wireless networks such as a local-area network (LAN), a wide-area network (WAN), a computer network, a wireless network, a telecommunications network, another like network or any combination thereof. For example, network 4243 a may comprise a Wi-Fi network. Network connection interface 4211 may be configured to include a receiver and a transmitter interface used to communicate with one or more other devices over a communication network according to one or more communication protocols, such as Ethernet, TCP/IP, SONET, ATM, or the like. Network connection interface 4211 may implement receiver and transmitter functionality appropriate to the communication network links (e.g., optical, electrical, and the like). The transmitter and receiver functions may share circuit components, software or firmware, or alternatively may be implemented separately.

RAM 4217 may be configured to interface via bus 4202 to processing circuitry 4201 to provide storage or caching of data or computer instructions during the execution of software programs such as the operating system, application programs, and device drivers. ROM 4219 may be configured to provide computer instructions or data to processing circuitry 4201. For example, ROM 4219 may be configured to store invariant low-level system code or data for basic system functions such as basic input and output (I/O), startup, or reception of keystrokes from a keyboard that are stored in a non-volatile memory. Storage medium 4221 may be configured to include memory such as RAM, ROM, programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic disks, optical disks, floppy disks, hard disks, removable cartridges, or flash drives. In one example, storage medium 4221 may be configured to include operating system 4223, application program 4225 such as a web browser application, a widget or gadget engine or another application, and data file 4227. Storage medium 4221 may store, for use by UE 4200, any of a variety of various operating systems or combinations of operating systems.

Storage medium 4221 may be configured to include a number of physical drive units, such as redundant array of independent disks (RAID), floppy disk drive, flash memory, USB flash drive, external hard disk drive, thumb drive, pen drive, key drive, high-density digital versatile disc (HD-DVD) optical disc drive, internal hard disk drive, Blu-Ray optical disc drive, holographic digital data storage (HDDS) optical disc drive, external mini-dual in-line memory module (DIMM), synchronous dynamic random access memory (SDRAM), external micro-DIMM SDRAM, smartcard memory such as a subscriber identity module or a removable user identity (SIM/RUIM) module, other memory, or any combination thereof. Storage medium 4221 may allow UE 4200 to access computer-executable instructions, application programs or the like, stored on transitory or non-transitory memory media, to off-load data, or to upload data. An article of manufacture, such as one utilizing a communication system may be tangibly embodied in storage medium 4221, which may comprise a device readable medium.

In FIG. 17 , processing circuitry 4201 may be configured to communicate with network 4243 b using communication subsystem 4231. Network 4243 a and network 4243 b may be the same network or networks or different network or networks. Communication subsystem 4231 may be configured to include one or more transceivers used to communicate with network 4243 b. For example, communication subsystem 4231 may be configured to include one or more transceivers used to communicate with one or more remote transceivers of another device capable of wireless communication such as another WD, UE, or base station of a radio access network (RAN) according to one or more communication protocols, such as IEEE 802.11, CDMA, WCDMA, GSM, LTE, UTRAN, WiMax, or the like. Each transceiver may include transmitter 4233 and/or receiver 4235 to implement transmitter or receiver functionality, respectively, appropriate to the RAN links (e.g., frequency allocations and the like). Further, transmitter 4233 and receiver 4235 of each transceiver may share circuit components, software or firmware, or alternatively may be implemented separately.

In the illustrated embodiment, the communication functions of communication subsystem 4231 may include data communication, voice communication, multimedia communication, short-range communications such as Bluetooth, near-field communication, location-based communication such as the use of the global positioning system (GPS) to determine a location, another like communication function, or any combination thereof. For example, communication subsystem 4231 may include cellular communication, Wi-Fi communication, Bluetooth communication, and GPS communication. Network 4243 b may encompass wired and/or wireless networks such as a local-area network (LAN), a wide-area network (WAN), a computer network, a wireless network, a telecommunications network, another like network or any combination thereof. For example, network 4243 b may be a cellular network, a Wi-Fi network, and/or a near-field network. Power source 4213 may be configured to provide alternating current (AC) or direct current (DC) power to components of UE 4200.

The features, benefits and/or functions described herein may be implemented in one of the components of UE 4200 or partitioned across multiple components of UE 4200. Further, the features, benefits, and/or functions described herein may be implemented in any combination of hardware, software or firmware. In one example, communication subsystem 4231 may be configured to include any of the components described herein. Further, processing circuitry 4201 may be configured to communicate with any of such components over bus 4202. In another example, any of such components may be represented by program instructions stored in memory that when executed by processing circuitry 4201 perform the corresponding functions described herein. In another example, the functionality of any of such components may be partitioned between processing circuitry 4201 and communication subsystem 4231. In another example, the non-computationally intensive functions of any of such components may be implemented in software or firmware and the computationally intensive functions may be implemented in hardware.

FIG. 18 illustrates a virtualization environment in accordance with some embodiments.

FIG. 18 is a schematic block diagram illustrating a virtualization environment 4300 in which functions implemented by some embodiments may be virtualized. In the present context, virtualizing means creating virtual versions of apparatuses or devices which may include virtualizing hardware platforms, storage devices and networking resources. As used herein, virtualization can be applied to a node (e.g., a virtualized base station or a virtualized radio access node) or to a device (e.g., a UE, a wireless device or any other type of communication device) or components thereof and relates to an implementation in which at least a portion of the functionality is implemented as one or more virtual components (e.g., via one or more applications, components, functions, virtual machines or containers executing on one or more physical processing nodes in one or more networks).

In some embodiments, some or all of the functions described herein may be implemented as virtual components executed by one or more virtual machines implemented in one or more virtual environments 4300 hosted by one or more of hardware nodes 4330. Further, in embodiments in which the virtual node is not a radio access node or does not require radio connectivity (e.g., a core network node), then the network node may be entirely virtualized.

The functions may be implemented by one or more applications 4320 (which may alternatively be called software instances, virtual appliances, network functions, virtual nodes, virtual network functions, etc.) operative to implement some of the features, functions, and/or benefits of some of the embodiments disclosed herein. Applications 4320 are run in virtualization environment 4300 which provides hardware 4330 comprising processing circuitry 4360 and memory 4390. Memory 4390 contains instructions 4395 executable by processing circuitry 4360 whereby application 4320 is operative to provide one or more of the features, benefits, and/or functions disclosed herein.

Virtualization environment 4300, comprises general-purpose or special-purpose network hardware devices 4330 comprising a set of one or more processors or processing circuitry 4360, which may be commercial off-the-shelf (COTS) processors, dedicated Application Specific Integrated Circuits (ASICs), or any other type of processing circuitry including digital or analog hardware components or special purpose processors. Each hardware device may comprise memory 4390-1 which may be non-persistent memory for temporarily storing instructions 4395 or software executed by processing circuitry 4360. Each hardware device may comprise one or more network interface controllers (NICs) 4370, also known as network interface cards, which include physical network interface 4380. Each hardware device may also include non-transitory, persistent, machine-readable storage media 4390-2 having stored therein software 4395 and/or instructions executable by processing circuitry 4360. Software 4395 may include any type of software including software for instantiating one or more virtualization layers 4350 (also referred to as hypervisors), software to execute virtual machines 4340 as well as software allowing it to execute functions, features and/or benefits described in relation with some embodiments described herein.

Virtual machines 4340 comprise virtual processing, virtual memory, virtual networking or interface and virtual storage, and may be run by a corresponding virtualization layer 4350 or hypervisor. Different embodiments of the instance of virtual appliance 4320 may be implemented on one or more of virtual machines 4340, and the implementations may be made in different ways.

During operation, processing circuitry 4360 executes software 4395 to instantiate the hypervisor or virtualization layer 4350, which may sometimes be referred to as a virtual machine monitor (VMM). Virtualization layer 4350 may present a virtual operating platform that appears like networking hardware to virtual machine 4340.

As shown in FIG. 18 , hardware 4330 may be a standalone network node with generic or specific components. Hardware 4330 may comprise antenna 43225 and may implement some functions via virtualization. Alternatively, hardware 4330 may be part of a larger cluster of hardware (e.g. such as in a data center or customer premise equipment (CPE)) where many hardware nodes work together and are managed via management and orchestration (MANO) 43100, which, among others, oversees lifecycle management of applications 4320.

Virtualization of the hardware is in some contexts referred to as network function virtualization (NFV). NFV may be used to consolidate many network equipment types onto industry standard high volume server hardware, physical switches, and physical storage, which can be located in data centers, and customer premise equipment.

In the context of NFV, virtual machine 4340 may be a software implementation of a physical machine that runs programs as if they were executing on a physical, non-virtualized machine. Each of virtual machines 4340, and that part of hardware 4330 that executes that virtual machine, be it hardware dedicated to that virtual machine and/or hardware shared by that virtual machine with others of the virtual machines 4340, forms a separate virtual network elements (VNE).

Still in the context of NFV, Virtual Network Function (VNF) is responsible for handling specific network functions that run in one or more virtual machines 4340 on top of hardware networking infrastructure 4330 and corresponds to application 4320 in FIG. 18 .

In some embodiments, one or more radio units 43200 that each include one or more transmitters 43220 and one or more receivers 43210 may be coupled to one or more antennas 43225. Radio units 43200 may communicate directly with hardware nodes 4330 via one or more appropriate network interfaces and may be used in combination with the virtual components to provide a virtual node with radio capabilities, such as a radio access node or a base station.

In some embodiments, some signalling can be effected with the use of control system 43230 which may alternatively be used for communication between the hardware nodes 4330 and radio units 43200.

FIG. 19 illustrates a telecommunication network connected via an intermediate network to a host computer in accordance with some embodiments.

With reference to FIG. 19 , in accordance with an embodiment, a communication system includes telecommunication network 4410, such as a 3GPP-type cellular network, which comprises access network 4411, such as a radio access network, and core network 4414. Access network 4411 comprises a plurality of base stations 4412 a, 4412 b, 4412 c, such as NBs, eNBs, gNBs or other types of wireless access points, each defining a corresponding coverage area 4413 a, 4413 b, 4413 c. Each base station 4412 a, 4412 b, 4412 c is connectable to core network 4414 over a wired or wireless connection 4415. A first UE 4491 located in coverage area 4413 c is configured to wirelessly connect to, or be paged by, the corresponding base station 4412 c. A second UE 4492 in coverage area 4413 a is wirelessly connectable to the corresponding base station 4412 a. While a plurality of UEs 4491, 4492 are illustrated in this example, the disclosed embodiments are equally applicable to a situation where a sole UE is in the coverage area or where a sole UE is connecting to the corresponding base station 4412.

Telecommunication network 4410 is itself connected to host computer 4430, which may be embodied in the hardware and/or software of a standalone server, a cloud-implemented server, a distributed server or as processing resources in a server farm. Host computer 4430 may be under the ownership or control of a service provider, or may be operated by the service provider or on behalf of the service provider. Connections 4421 and 4422 between telecommunication network 4410 and host computer 4430 may extend directly from core network 4414 to host computer 4430 or may go via an optional intermediate network 4420. Intermediate network 4420 may be one of, or a combination of more than one of, a public, private or hosted network; intermediate network 4420, if any, may be a backbone network or the Internet; in particular, intermediate network 4420 may comprise two or more sub-networks (not shown).

The communication system of FIG. 19 as a whole enables connectivity between the connected UEs 4491, 4492 and host computer 4430. The connectivity may be described as an over-the-top (OTT) connection 4450. Host computer 4430 and the connected UEs 4491, 4492 are configured to communicate data and/or signaling via OTT connection 4450, using access network 4411, core network 4414, any intermediate network 4420 and possible further infrastructure (not shown) as intermediaries. OTT connection 4450 may be transparent in the sense that the participating communication devices through which OTT connection 4450 passes are unaware of routing of uplink and downlink communications. For example, base station 4412 may not or need not be informed about the past routing of an incoming downlink communication with data originating from host computer 4430 to be forwarded (e.g., handed over) to a connected UE 4491. Similarly, base station 4412 need not be aware of the future routing of an outgoing uplink communication originating from the UE 4491 towards the host computer 4430.

FIG. 20 illustrates a host computer communicating via a base station with a user equipment over a partially wireless connection in accordance with some embodiments.

Example implementations, in accordance with an embodiment, of the UE, base station and host computer discussed in the preceding paragraphs will now be described with reference to FIG. 20 . In communication system 4500, host computer 4510 comprises hardware 4515 including communication interface 4516 configured to set up and maintain a wired or wireless connection with an interface of a different communication device of communication system 4500. Host computer 4510 further comprises processing circuitry 4518, which may have storage and/or processing capabilities. In particular, processing circuitry 4518 may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions. Host computer 4510 further comprises software 4511, which is stored in or accessible by host computer 4510 and executable by processing circuitry 4518. Software 4511 includes host application 4512. Host application 4512 may be operable to provide a service to a remote user, such as UE 4530 connecting via OTT connection 4550 terminating at UE 4530 and host computer 4510. In providing the service to the remote user, host application 4512 may provide user data which is transmitted using OTT connection 4550.

Communication system 4500 further includes base station 4520 provided in a telecommunication system and comprising hardware 4525 enabling it to communicate with host computer 4510 and with UE 4530. Hardware 4525 may include communication interface 4526 for setting up and maintaining a wired or wireless connection with an interface of a different communication device of communication system 4500, as well as radio interface 4527 for setting up and maintaining at least wireless connection 4570 with UE 4530 located in a coverage area (not shown in FIG. 20 ) served by base station 4520. Communication interface 4526 may be configured to facilitate connection 4560 to host computer 4510. Connection 4560 may be direct or it may pass through a core network (not shown in FIG. 20 ) of the telecommunication system and/or through one or more intermediate networks outside the telecommunication system. In the embodiment shown, hardware 4525 of base station 4520 further includes processing circuitry 4528, which may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions. Base station 4520 further has software 4521 stored internally or accessible via an external connection.

Communication system 4500 further includes UE 4530 already referred to. Its hardware 4535 may include radio interface 4537 configured to set up and maintain wireless connection 4570 with a base station serving a coverage area in which UE 4530 is currently located. Hardware 4535 of UE 4530 further includes processing circuitry 4538, which may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions. UE 4530 further comprises software 4531, which is stored in or accessible by UE 4530 and executable by processing circuitry 4538. Software 4531 includes client application 4532. Client application 4532 may be operable to provide a service to a human or non-human user via UE 4530, with the support of host computer 4510. In host computer 4510, an executing host application 4512 may communicate with the executing client application 4532 via OTT connection 4550 terminating at UE 4530 and host computer 4510. In providing the service to the user, client application 4532 may receive request data from host application 4512 and provide user data in response to the request data. OTT connection 4550 may transfer both the request data and the user data. Client application 4532 may interact with the user to generate the user data that it provides.

It is noted that host computer 4510, base station 4520 and UE 4530 illustrated in FIG. 20 may be similar or identical to host computer 4430, one of base stations 4412 a, 4412 b, 4412 c and one of UEs 4491, 4492 of FIG. 19 , respectively. This is to say, the inner workings of these entities may be as shown in FIG. 20 and independently, the surrounding network topology may be that of FIG. 19 .

In FIG. 20 , OTT connection 4550 has been drawn abstractly to illustrate the communication between host computer 4510 and UE 4530 via base station 4520, without explicit reference to any intermediary devices and the precise routing of messages via these devices. Network infrastructure may determine the routing, which it may be configured to hide from UE 4530 or from the service provider operating host computer 4510, or both. While OTT connection 4550 is active, the network infrastructure may further take decisions by which it dynamically changes the routing (e.g., on the basis of load balancing consideration or reconfiguration of the network).

Wireless connection 4570 between UE 4530 and base station 4520 is in accordance with the teachings of the embodiments described throughout this disclosure. One or more of the various embodiments may improve the performance of OTT services provided to UE 4530 using OTT connection 4550, in which wireless connection 4570 forms the last segment. More precisely, the teachings of these embodiments may improve the random access speed and/or reduce random access failure rates and thereby provide benefits such as faster and/or more reliable random access.

A measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve. There may further be an optional network functionality for reconfiguring OTT connection 4550 between host computer 4510 and UE 4530, in response to variations in the measurement results. The measurement procedure and/or the network functionality for reconfiguring OTT connection 4550 may be implemented in software 4511 and hardware 4515 of host computer 4510 or in software 4531 and hardware 4535 of UE 4530, or both. In embodiments, sensors (not shown) may be deployed in or in association with communication devices through which OTT connection 4550 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which software 4511, 4531 may compute or estimate the monitored quantities. The reconfiguring of OTT connection 4550 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not affect base station 4520, and it may be unknown or imperceptible to base station 4520. Such procedures and functionalities may be known and practiced in the art. In certain embodiments, measurements may involve proprietary UE signaling facilitating host computer 4510's measurements of throughput, propagation times, latency and the like. The measurements may be implemented in that software 4511 and 4531 causes messages to be transmitted, in particular empty or ‘dummy’ messages, using OTT connection 4550 while it monitors propagation times, errors etc.

FIG. 21 illustrates methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments

FIG. 21 is a flowchart illustrating a method implemented in a communication system, in accordance with one embodiment. The communication system includes a host computer, a base station and a UE which may be those described with reference to FIGS. 19-20 . For simplicity of the present disclosure, only drawing references to FIG. 21 will be included in this section. In step 4610, the host computer provides user data. In substep 4611 (which may be optional) of step 4610, the host computer provides the user data by executing a host application. In step 4620, the host computer initiates a transmission carrying the user data to the UE. In step 4630 (which may be optional), the base station transmits to the UE the user data which was carried in the transmission that the host computer initiated, in accordance with the teachings of the embodiments described throughout this disclosure. In step 4640 (which may also be optional), the UE executes a client application associated with the host application executed by the host computer.

FIG. 22 illustrates methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments.

FIG. 22 is a flowchart illustrating a method implemented in a communication system, in accordance with one embodiment. The communication system includes a host computer, a base station and a UE which may be those described with reference to FIGS. 19-20 . For simplicity of the present disclosure, only drawing references to FIG. 22 will be included in this section. In step 4710 of the method, the host computer provides user data. In an optional substep (not shown) the host computer provides the user data by executing a host application. In step 4720, the host computer initiates a transmission carrying the user data to the UE. The transmission may pass via the base station, in accordance with the teachings of the embodiments described throughout this disclosure. In step 4730 (which may be optional), the UE receives the user data carried in the transmission.

FIG. 23 illustrates methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments

FIG. 23 is a flowchart illustrating a method implemented in a communication system, in accordance with one embodiment. The communication system includes a host computer, a base station and a UE which may be those described with reference to FIGS. 19-20 . For simplicity of the present disclosure, only drawing references to FIG. 23 will be included in this section. In step 4810 (which may be optional), the UE receives input data provided by the host computer. Additionally or alternatively, in step 4820, the UE provides user data. In substep 4821 (which may be optional) of step 4820, the UE provides the user data by executing a client application. In substep 4811 (which may be optional) of step 4810, the UE executes a client application which provides the user data in reaction to the received input data provided by the host computer. In providing the user data, the executed client application may further consider user input received from the user. Regardless of the specific manner in which the user data was provided, the UE initiates, in substep 4830 (which may be optional), transmission of the user data to the host computer. In step 4840 of the method, the host computer receives the user data transmitted from the UE, in accordance with the teachings of the embodiments described throughout this disclosure.

FIG. 24 illustrates methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments

FIG. 24 is a flowchart illustrating a method implemented in a communication system, in accordance with one embodiment. The communication system includes a host computer, a base station and a UE which may be those described with reference to FIGS. 19-20 . For simplicity of the present disclosure, only drawing references to FIG. 24 will be included in this section. In step 4910 (which may be optional), in accordance with the teachings of the embodiments described throughout this disclosure, the base station receives user data from the UE. In step 4920 (which may be optional), the base station initiates transmission of the received user data to the host computer. In step 4930 (which may be optional), the host computer receives the user data carried in the transmission initiated by the base station.

Any appropriate steps, methods, features, functions, or benefits disclosed herein may be performed through one or more functional units or modules of one or more virtual apparatuses. Each virtual apparatus may comprise a number of these functional units. These functional units may be implemented via processing circuitry, which may include one or more microprocessor or microcontrollers, as well as other digital hardware, which may include digital signal processors (DSPs), special-purpose digital logic, and the like. The processing circuitry may be configured to execute program code stored in memory, which may include one or several types of memory such as read-only memory (ROM), random-access memory (RAM), cache memory, flash memory devices, optical storage devices, etc. Program code stored in memory includes program instructions for executing one or more telecommunications and/or data communications protocols as well as instructions for carrying out one or more of the techniques described herein. In some implementations, the processing circuitry may be used to cause the respective functional unit to perform corresponding functions according one or more embodiments of the present disclosure.

The term unit may have conventional meaning in the field of electronics, electrical devices and/or electronic devices and may include, for example, electrical and/or electronic circuitry, devices, modules, processors, memories, logic solid state and/or discrete devices, computer programs or instructions for carrying out respective tasks, procedures, computations, outputs, and/or displaying functions, and so on, as such as those that are described herein.

Abbreviations

At least some of the following abbreviations may be used in this disclosure. If there is an inconsistency between abbreviations, preference should be given to how it is used above. If listed multiple times below, the first listing should be preferred over any subsequent listing(s).

-   -   1×RTT CDMA2000 1× Radio Transmission Technology     -   3GPP 3rd Generation Partnership Project     -   5G 5th Generation     -   ABS Almost Blank Subframe     -   ARQ Automatic Repeat Request     -   AWGN Additive White Gaussian Noise     -   BCCH Broadcast Control Channel     -   BCH Broadcast Channel     -   CA Carrier Aggregation     -   CC Carrier Component     -   CCCH SDU Common Control Channel SDU     -   CDMA Code Division Multiplexing Access     -   CGI Cell Global Identifier     -   CIR Channel Impulse Response     -   CP Cyclic Prefix     -   CPICH Common Pilot Channel     -   CPICH Ec/No CPICH Received energy per chip divided by the power         density in the band     -   CQI Channel Quality information     -   C-RNTI Cell RNTI     -   CSI Channel State Information     -   DCCH Dedicated Control Channel     -   DL Downlink     -   DM Demodulation     -   DMRS Demodulation Reference Signal     -   DRX Discontinuous Reception     -   DTX Discontinuous Transmission     -   DTCH Dedicated Traffic Channel     -   DUT Device Under Test     -   E-CID Enhanced Cell-ID (positioning method)     -   E-SMLC Evolved-Serving Mobile Location Centre     -   ECGI Evolved CGI     -   eNB E-UTRAN NodeB     -   ePDCCH enhanced Physical Downlink Control Channel     -   E-SMLC evolved Serving Mobile Location Center     -   E-UTRA Evolved UTRA     -   E-UTRAN Evolved UTRAN     -   FDD Frequency Division Duplex     -   FFS For Further Study     -   GERAN GSM EDGE Radio Access Network     -   gNB Base station in NR     -   GNSS Global Navigation Satellite System     -   GSM Global System for Mobile communication     -   HARQ Hybrid Automatic Repeat Request     -   HO Handover     -   HSPA High Speed Packet Access     -   HRPD High Rate Packet Data     -   LOS Line of Sight     -   LPP LTE Positioning Protocol     -   LTE Long-Term Evolution     -   MAC Medium Access Control     -   MBMS Multimedia Broadcast Multicast Services     -   MBSFN Multimedia Broadcast multicast service Single Frequency         Network     -   MBSFN ABS MBSFN Almost Blank Subframe     -   MDT Minimization of Drive Tests     -   MIB Master Information Block     -   MME Mobility Management Entity     -   MSC Mobile Switching Center     -   NPDCCH Narrowband Physical Downlink Control Channel     -   NR New Radio     -   OCNG OFDMA Channel Noise Generator     -   OFDM Orthogonal Frequency Division Multiplexing     -   OFDMA Orthogonal Frequency Division Multiple Access     -   OSS Operations Support System     -   OTDOA Observed Time Difference of Arrival     -   O&M Operation and Maintenance     -   PBCH Physical Broadcast Channel     -   P-CCPCH Primary Common Control Physical Channel     -   PCell Primary Cell     -   PCFICH Physical Control Format Indicator Channel     -   PDCCH Physical Downlink Control Channel     -   PDP Profile Delay Profile     -   PDSCH Physical Downlink Shared Channel     -   PGW Packet Gateway     -   PHICH Physical Hybrid-ARQ Indicator Channel     -   PLMN Public Land Mobile Network     -   PMI Precoder Matrix Indicator     -   PRACH Physical Random Access Channel     -   PRS Positioning Reference Signal     -   PSS Primary Synchronization Signal     -   PUCCH Physical Uplink Control Channel     -   PUSCH Physical Uplink Shared Channel     -   RACH Random Access Channel     -   QAM Quadrature Amplitude Modulation     -   RAN Radio Access Network     -   RAT Radio Access Technology     -   RLM Radio Link Management     -   RNC Radio Network Controller     -   RNTI Radio Network Temporary Identifier     -   RRC Radio Resource Control     -   RRM Radio Resource Management     -   RS Reference Signal     -   RSCP Received Signal Code Power     -   RSRP Reference Symbol Received Power OR Reference Signal         Received Power     -   RSRQ Reference Signal Received Quality OR Reference Symbol         Received Quality     -   RSSI Received Signal Strength Indicator     -   RSTD Reference Signal Time Difference     -   SCH Synchronization Channel     -   SCell Secondary Cell     -   SDU Service Data Unit     -   SFN System Frame Number     -   SGW Serving Gateway     -   SI System Information     -   SIB System Information Block     -   SNR Signal to Noise Ratio     -   SON Self Optimized Network     -   SS Synchronization Signal     -   SSS Secondary Synchronization Signal     -   TDD Time Division Duplex     -   TDOA Time Difference of Arrival     -   TOA Time of Arrival     -   TSS Tertiary Synchronization Signal     -   TTI Transmission Time Interval     -   UE User Equipment     -   UL Uplink     -   UMTS Universal Mobile Telecommunication System     -   USIM Universal Subscriber Identity Module     -   UTDOA Uplink Time Difference of Arrival     -   UTRA Universal Terrestrial Radio Access     -   UTRAN Universal Terrestrial Radio Access Network     -   WCDMA Wide CDMA     -   WLAN Wide Local Area Network

Further definitions and embodiments are discussed below.

In the above-description of various embodiments of present inventive concepts, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of present inventive concepts. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which present inventive concepts belong. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

When an element is referred to as being “connected”, “coupled”, “responsive”, or variants thereof to another element, it can be directly connected, coupled, or responsive to the other element or intervening elements may be present. In contrast, when an element is referred to as being “directly connected”, “directly coupled”, “directly responsive”, or variants thereof to another element, there are no intervening elements present. Like numbers refer to like elements throughout. Furthermore, “coupled”, “connected”, “responsive”, or variants thereof as used herein may include wirelessly coupled, connected, or responsive. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. Well-known functions or constructions may not be described in detail for brevity and/or clarity. The term “and/or” (abbreviated “/”) includes any and all combinations of one or more of the associated listed items.

It will be understood that although the terms first, second, third, etc. may be used herein to describe various elements/operations, these elements/operations should not be limited by these terms. These terms are only used to distinguish one element/operation from another element/operation. Thus a first element/operation in some embodiments could be termed a second element/operation in other embodiments without departing from the teachings of present inventive concepts. The same reference numerals or the same reference designators denote the same or similar elements throughout the specification.

As used herein, the terms “comprise”, “comprising”, “comprises”, “include”, “including”, “includes”, “have”, “has”, “having”, or variants thereof are open-ended, and include one or more stated features, integers, elements, steps, components or functions but does not preclude the presence or addition of one or more other features, integers, elements, steps, components, functions or groups thereof. Furthermore, as used herein, the common abbreviation “e.g.”, which derives from the Latin phrase “exempli gratia,” may be used to introduce or specify a general example or examples of a previously mentioned item, and is not intended to be limiting of such item. The common abbreviation “i.e.”, which derives from the Latin phrase “id est,” may be used to specify a particular item from a more general recitation.

Example embodiments are described herein with reference to block diagrams and/or flowchart illustrations of computer-implemented methods, apparatus (systems and/or devices) and/or computer program products. It is understood that a block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions that are performed by one or more computer circuits. These computer program instructions may be provided to a processor circuit of a general purpose computer circuit, special purpose computer circuit, and/or other programmable data processing circuit to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, transform and control transistors, values stored in memory locations, and other hardware components within such circuitry to implement the functions/acts specified in the block diagrams and/or flowchart block or blocks, and thereby create means (functionality) and/or structure for implementing the functions/acts specified in the block diagrams and/or flowchart block(s).

These computer program instructions may also be stored in a tangible computer-readable medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable medium produce an article of manufacture including instructions which implement the functions/acts specified in the block diagrams and/or flowchart block or blocks. Accordingly, embodiments of present inventive concepts may be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.) that runs on a processor such as a digital signal processor, which may collectively be referred to as “circuitry,” “a module” or variants thereof.

It should also be noted that in some alternate implementations, the functions/acts noted in the blocks may occur out of the order noted in the flowcharts. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Moreover, the functionality of a given block of the flowcharts and/or block diagrams may be separated into multiple blocks and/or the functionality of two or more blocks of the flowcharts and/or block diagrams may be at least partially integrated. Finally, other blocks may be added/inserted between the blocks that are illustrated, and/or blocks/operations may be omitted without departing from the scope of inventive concepts. Moreover, although some of the diagrams include arrows on communication paths to show a primary direction of communication, it is to be understood that communication may occur in the opposite direction to the depicted arrows.

Many variations and modifications can be made to the embodiments without substantially departing from the principles of the present inventive concepts. All such variations and modifications are intended to be included herein within the scope of present inventive concepts. Accordingly, the above disclosed subject matter is to be considered illustrative, and not restrictive, and the examples of embodiments are intended to cover all such modifications, enhancements, and other embodiments, which fall within the spirit and scope of present inventive concepts. Thus, to the maximum extent allowed by law, the scope of present inventive concepts are to be determined by the broadest permissible interpretation of the present disclosure including the examples of embodiments and their equivalents, and shall not be restricted or limited by the foregoing detailed description. 

1. A method of operating a communication device in a communications network, the method comprising: monitoring physical downlink control channel, PDCCH, candidates on a primary cell, PCell, for PCell assignments; determining a maximum number of monitoring elements based on at least one of a higher layer configuration related to secondary cell, SCell, to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell; and responsive to determining the maximum number of monitoring elements, monitoring PDCCH candidates on the SCell based on the maximum number of monitoring elements.
 2. The method of claim 1, wherein determining the maximum number of monitoring elements comprises: responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for the PCell assignments, determining that the maximum number of monitoring elements is a first value; or responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for only SCell assignments, determining that the maximum number of monitoring elements is a second value, the first value being larger than the second value.
 3. The method of claim 2, wherein the maximum number of monitoring elements is a first maximum number of monitoring elements, wherein monitoring the PDCCH candidates on the PCell for the PCell assignments comprises monitoring the PDCCH candidates on the PCell for the PCell assignments based on a second maximum number of monitoring elements, and wherein determining the maximum number of monitoring elements comprises: responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for the PCell assignments, determining that the second maximum number of monitoring elements is a third value; or responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for only SCell assignments, determining that the second maximum number of monitoring elements is a fourth value, the third value being larger than the fourth value by a transfer amount; and determining the first value or the second value based on the transfer amount, the first value being at least the transfer amount more than the second value.
 4. The method of claim 1, wherein determining the maximum number of monitoring elements comprises: determining a first scaling factor based on a number of coreset pools configured for PDCCH monitoring on the SCell; and determining the maximum number of monitoring elements based on the first scaling factor.
 5. The method of claim 1, wherein determining the maximum number of monitoring elements comprises: determining a first scaling factor based on a number of coreset pools configured for PDCCH monitoring on the SCell and a number of coreset pools configured for PDCCH monitoring on the PCell; and determining the maximum number of monitoring elements based on the first scaling factor.
 6. The method of claim 1, wherein determining the maximum number of monitoring elements comprises: receiving an indication from a network node of the communications network; and determining the maximum number of monitoring elements based on the indication, and wherein the indication indicates at least one of: whether the higher layer configuration can be configured for the communication device; allowable values of the higher layer configuration that can be configured for the communication device; and applicable values for the coreset pools configured for PDCCH monitoring.
 7. The method of claim 1, wherein determining the maximum number of monitoring elements comprises determining the maximum number of monitoring elements based on a PDCCH blind decoding capability supported by the communication device for carrier aggregation, CA.
 8. The method of claim 1, wherein determining the maximum number of monitoring elements comprises: determining a second scaling factor based on a subcarrier spacing configuration, SCS, of the PCell and a SCS configuration of the SCell; and determining the maximum number of monitoring elements based on the second scaling factor.
 9. The method of claim 1, wherein monitoring the PDCCH candidates on the SCell comprises monitoring the PDCCH candidates on the SCell for the PCell assignments based on the maximum number of monitoring elements, the method further comprising: detecting a PDCCH candidate on the SCell with a PCell assignment; and communicating with the network node on the PCell according to the PCell assignment.
 10. The method of claim 1, wherein monitoring the PDCCH candidates on the SCell comprises monitoring the PDCCH candidates on the SCell for SCell assignments based on the maximum number of monitoring elements, the method further comprising: detecting a PDCCH candidate on the SCell with a SCell assignment; and communicating with the network node on the SCell according to the SCell assignment.
 11. The method of claim 1, wherein the maximum number of monitoring elements comprises a maximum number of PDCCH blind decoding candidates or a maximum number of non-overlapping control channel elements, wherein the PCell assignments comprise PCell physical downlink shared channel, PDSCH, and/or physical uplink shared channel, PUSCH, assignments, and wherein the SCell assignments comprise SCell PDSCH and/or PUSCH assignments.
 12. A method of operating a network node in a communications network, the method comprising: determining whether a communication device in the communications network is configured to monitor physical downlink control channel, PDCCH, candidates on a secondary cell, SCell, for primary cell, PCell, assignments; determining a maximum number of monitoring elements that the communication device will use when monitoring the PDCCH candidates on the SCell based on at least one of a higher layer configuration related to SCell to PCell scheduling and a number of control resource set, coreset, pools configured for PDCCH monitoring on the SCell and/or the PCell; determining a set of PDCCH candidates on the SCell based on the maximum number of monitoring elements; and transmitting SCell assignments or the PCell assignments on individual PDCCH candidates of the set of PDCCH candidates on the SCell.
 13. The method of claim 12, wherein determining the maximum number of monitoring elements comprises: determining a first scaling factor based on a number of coreset pools configured for PDCCH monitoring on the SCell; and determining the maximum number of monitoring elements based on the first scaling factor.
 14. The method of claim 12, wherein determining the maximum number of monitoring elements comprises: determining a first scaling factor based on a number of coreset pools configured for PDCCH monitoring on the SCell and a number of coreset pools configured for PDCCH monitoring on the PCell; and determining the maximum number of monitoring elements based on the first scaling factor.
 15. The method of claim 12, wherein determining the maximum number of monitoring elements comprises: responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for the PCell assignments, determining that the maximum number of monitoring elements is a first value; or responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for only SCell assignments, determining that the maximum number of monitoring elements is a second value, the first value being larger than the second value.
 16. The method of claim 15, wherein the maximum number of monitoring elements is a first maximum number of monitoring elements, and wherein determining the maximum number of monitoring elements comprises: determining that the communication device is configured to monitor the PDCCH, candidates on a PCell for the PCell assignments based on a second maximum number of monitoring elements; responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for the PCell assignments, determining that the second maximum number of monitoring elements is a third value; or responsive to determining that the communication device will monitor the PDCCH candidates on the SCell for only SCell assignments, determining that the second maximum number of monitoring elements is a fourth value, the third value being larger than the fourth value by a transfer amount; and determining the first value or the second value based on the transfer amount, the first value being at least the transfer amount more than the second value.
 17. The method of claim 12, wherein determining the maximum number of monitoring elements comprises: transmitting an indication to the communication device; and determining the maximum number of monitoring elements based on the indication, wherein the indication indicates at least one of: whether the higher layer configuration can be configured for the communication device; allowable values of the higher layer configuration that can be configured for the communication device; and applicable values for the number of coreset pools configured for PDCCH monitoring.
 18. The method of claim 12, wherein determining the set of PDCCH candidates on the SCell comprises determining the set of PDCCH candidates on the SCell based on a PDCCH blind decoding capability supported by the communication device for carrier aggregation, CA.
 19. The method of claim 12, wherein determining the set of PDCCH candidates on the SCell comprises: determining a second scaling factor based on a subcarrier spacing configuration, SCS, of the PCell and a SCS configuration of the SCell; and determining the set of PDCCH candidates on the SCell based on the second scaling factor.
 20. The method of claim 12, further comprising: responsive to transmitting PCell assignments on the set of PDCCH candidates on the SCell, communicating with the communication device on the PCell according to the PCell assignment; or responsive to transmitting SCell assignments on the set of PDCCH candidates on the SCell, communicating with the communication device on the SCell according to the SCell assignment.
 21. The method of claim 12, wherein the maximum number of monitoring elements comprises a maximum number of PDCCH blind decoding candidates or a maximum number of non-overlapping control channel elements, wherein the PCell assignments comprise PCell physical downlink shared channel, PDSCH, and/or physical uplink shared channel, PUSCH, assignments, and wherein the SCell assignments comprise SCell PDSCH and/or PUSCH assignments.
 22. A communication device configured to operate in a communications network, the communication device comprising: processing circuitry; and memory coupled to the processing circuitry and having instructions stored therein that are executable by the processing circuitry to cause the communication device to perform any of the operations of claim
 1. 23. A network node configured to operate in a communications, the network node comprising: processing circuitry; and memory coupled to the processing circuitry and having instructions stored therein that are executable by the processing circuitry to cause the network node to perform any of the operations of claim
 12. 24.-29. (canceled) 